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Scientific American

March 1, 1980

1 min read

The Amateur Scientist, March 1980

Stalking the fossil trilobite, crinoid and seed fern in Ohio

By Jearl Walker

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This article was originally published with the title “The Amateur Scientist” in Scientific American Magazine Vol. 242 No. 3 (March 1980), p. 184
doi:10.1038/scientificamerican0380-184

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