Proceedings of the National Academy of Sciences of the United States of America, Volume 5

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The Academy, 1919 - Science
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The Proceedings of the National Academy of Sciences (PNAS) publishes research reports, commentaries, reviews, colloquium papers, and actions of the Academy. PNAS is a multidisciplinary journal that covers the biological, physical, and social sciences.

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Flagellate Affinities or Trichonympha By Charles Atwood Kofoid and Olive Swezy
The Ternary System CaOMgOSiOj By J B Ferguson and H E Merwin

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