GATA posts a helpful compilation of links to articles on gold price manipulation and a page on the history of that manipulation at The Privateer.com. And excerpt from that (from the period after 1960):

“The End Of the “Fixed” Dollar

Gold War I – The “London Gold Pool” – 1961 to 1968
By the beginning of the 1960s, the $US 35 = 1 oz. Gold ratio was becoming more and more difficult to sustain. Gold demand was rising and U.S. Gold reserves were falling, both as a result of the ever increasing trade deficits which the U.S. continued to run with the rest of the world. Shortly after President Kennedy was Inaugurated in January 1961, and to combat this situation, newly-appointed Undersecretary of the Treasury Robert Roosa suggested that the U.S. and Europe should pool their Gold resources to prevent the private market price for Gold from exceeding the mandated rate of $US 35 per ounce. Acting on this suggestion, the Central Banks of the U.S., Britain, West Germany, France, Switzerland, Italy, Belgium, the Netherlands, and Luxembourg set up the “London Gold Pool” in early 1961.

The Pool came unstuck when the French, under Charles de Gaulle, reneged and began to send the Dollars earned by exporting to the U.S. back and demanding Gold rather than Treasury debt paper in return. Under the terms of the Bretton Woods Agreement signed in 1944, France was legally entitled to do this. The drain on U.S. Gold became acute, and the London Gold Pool folded in April 1968. But the demand for U.S. Gold did not abate.

By the end of the 1960s, the U.S. faced the stark choice of eliminating their trade deficits or revaluing the Dollar downwards against Gold to reflect the actual situation. President Nixon decided to do neither. Instead, he repudiated the international obligation of the U.S. to redeem its Dollar in Gold just as President Roosevelt had repudiated the domestic obligation in 1933. On August 15, 1971, Mr Nixon closed the “Gold Window”. The last link between Gold and the Dollar was gone. The result was inevitable. In February 1973, the world’s currencies “floated”. By the end of 1974, Gold had soared from $35 to $195 an ounce.

Gold War II – The IMF/U.S. Treasury Gold Auctions – 1975 to 1979
On January 1, 1975, after 42 years, it again became “legal” for individual Americans to own Gold. Anticipating the demand, the U.S. Treasury in particular and many other Central Banks sold large quantities of Gold, taking large paper profits in the process. This had two results. It depressed the price of Gold, which fell to $US 103 in eighteen months. More important by far, it “burned” large numbers of small individual investors.

But this “pre-emptive strike” against the Gold price did not solve the imbalances inherent in the floating currency regime. As the Gold price began to recover from its August 1976 low, the (US-controlled) IMF along with the Treasury itself, began a series of Gold auctions in an attempt to hold down the price through official means. But the problem of yet another free fall in the international value of the Dollar got in the way. Between January and October of 1978, the Dollar lost fully 25% of its value against a basket of the currencies of its major trading partners. By early 1979, due to this precipitous fall, the demand for Gold was overwhelming the amount that the IMF/Treasury dared supply, and the Gold auctions came to an end.

Gold regained its ($195) December 1974 level by July 1978. It then pressed on to new highs, hitting $250 in February 1979 and $300 in July. Also in July, Paul Volcker was appointed as Fed Chairman by a desperate Jimmy Carter. Gold continued to surge, hitting $400 in October. While this was happening, Mr Volcker was attending a conference in Belgrade. There the assessment was made that the global financial system was on the verge of collapse. When Mr Volcker returned to the U.S. from Belgrade, he took a momentous step. He announced that the Fed was switching its policy from controlling interest rates to controlling the money supply.

This new Fed policy took some time to have effect. In the meantime, Gold soared from $381 on Nov. 1, 1979 to $850 on Jan. 21, 1980. The public, who had been burned in 1975, were late on the scene. The great burst of public Gold buying came in the four weeks between Christmas 1979 and the Jan 21, 1980 high. As in 1975, they were “burned” again.

The Paper Era Begins
In early 1980, Mr Volcker’s new Fed policy began to bite. U.S. interest rates began to skyrocket. As they rose, the Dollar first slowed its descent, then stopped falling, and then began to rise. Both the public and the investment community which had stampeded into Gold was lured back into paper by this huge rise in interest rates – and by the prospect of a higher U.S. Dollar. The threat of financial meltdown was averted, but at a cost. The U.S. Prime rate hit 20% in April 1980 and stayed there (with a brief dive in mid-1980) until the end of 1981. There was a rush out of Gold and back to Dollars.

Once interest rates began to come down, in early/mid 1982, the choice of where to put the Dollars faced investors once more. The initial solution was just as it had been in the 1970s. The Dow took off – rising from 776 to almost 1100 between mid August 1982 and late January 1983. Gold started earlier and took off even harder – rising from $296 in late June 1982 to $510 at the end of January 1983.

That’s where the similarity to the 1970s ended. Gold fell $105 in the last four trading days of February 1983. As it fell, the Dow broke above the 1100 point level for the first time. The long bull market in stocks, and the long stagnation of Gold, had begun…..”