Author:

Schopf,J.W.

Year:

1970

Title:

Organically preserved Precambrian microorganisms.

Reference:

Schopf,J.W. (1970) Organically preserved Precambrian microorganisms. Proceedings of the North American Paleontological Convention. Field Museum of Natural History. Chicago, September 1969 Vol. 2 P. 1013- 1057

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