SINE

Per Andrew Wilson,Solar System Log,1st ed. (London: Jane’s Publishing Co., Ltd., 1987), p.94:

Get this: Over six manned Apollo missions, U.S.astronauts collected 842 pounds of rock from the moon. Over three robotic Luna missions, the Russians collected 10 and a half ounces.

The Russians and Americans traded some during Russian Luna program 1971, 1972, and 1976. China was not in on any of that.

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