Evolution of Gaseous Nebulae.

نویسندگان

  • F D Kahn
  • T K Menon
چکیده

55Swain, F. M., A Blumentals, and N. Prokopovich, "Bituminous and other organic substances in Pre-Cambrian of Minnesota," Am. Assoc. Petrol. Geol. Bull., 42, 173-189 (1958). M Timofeev, B. V., "Spores and phytoplankton from Proterozoic and early Paleozoic of Eurasia," in Proc. 21st Int. Geol. Congr., Copenhagen, Rept. Soviet Geologists, Problem 9, 177-188 (1960) (in Russian; English abstract, p. 188). 57 Timofeev, B. V., "Precambrian spores," in Proc. 21st 1nt. Geol. Congr., Copenhagen, Rept. Soviet Geologists, Problem 9, 138-149 (1960) (in Russian). 58 Tyler, S. A., and E. S. Barghoorn, "Occurrence of structurally preserved plants in preCambrian rocks of the Canadian shield," Science, 119, 606-608 (1954). 69 Tyler, S. A., E. S. Barghoorn, and L. P. Barrett, "Anthracitic coal from Precambrian upper Huronian black shale of the Iron River district, northern Michigan," Geol. Soc. Amer. Bull., 68, 1293-1304 (1957). 60 Vallentyne, J. R., "Fossil pigments," in Comparative Biochemistry of Photoreactive Systems (New York: Academic Press, Inc., 1960), pp. 83-105.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 47 11  شماره 

صفحات  -

تاریخ انتشار 1961