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Page 112 of Proceedings of the National Academy of Sciences of the United States of America Vol. 18, Issue 1 [page]

1932 Proceedings of the National Academy of Sciences of the United States of America  

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https://archive.org/details/sim_proceedings-of-the-national-academy-of-sciences-usa_1932-01-15_18_1/page/112

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Citation

Proceedings of the National Academy of Sciences of the United States of America 18.1 (1932) 112