VOL. 167 · NO. 1 | March 2020
 
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Proceedings of the Academy of Natural Sciences contains papers in the areas of systematics, taxonomy, evolution, biogeography, and ecology.
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Articles (7)
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Articles
167(1), 1-9, (9 May 2019)https://doi.org/10.1635/053.167.0101
KEYWORDS: history of science, Thomas Say, Samuel Morton, Malacology, Ammonoidea, Navesink Formation
167(1), 27-47, (15 July 2019)https://doi.org/10.1635/053.167.0103
KEYWORDS: Alvin R. Cahn, Tokubei Kuroda, Takashi Ino, Japan, GHQ, Yoshio Shirai, Natural Resources Section, mollusks
167(1), 57-68, (17 March 2020)https://doi.org/10.1635/053.167.0105
KEYWORDS: Hydrochoerinae, Neochoerus aesopi, Leidy
167(1), 69-86, (17 March 2020)https://doi.org/10.1635/053.167.0106
KEYWORDS: biodiversity, biogeography, freshwater, neotropical, taxonomy, systematics
167(1), 87-103, (26 March 2020)https://doi.org/10.1635/053.167.0107
KEYWORDS: sediment accumulation, accretion, nutrients, radionuclides, stable isotopes
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