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- 41009787 contributor B982569.
- 41009787 contributor B982570.
- 41009787 created "1941.".
- 41009787 date "1941".
- 41009787 date "1941.".
- 41009787 dateCopyrighted "1941.".
- 41009787 extent "2 p. l., 17 p. ;".
- 41009787 isPartOf "University of Pennsylvania. Leidy memorial lectures".
- 41009787 issued "1941".
- 41009787 issued "1941.".
- 41009787 language "eng".
- 41009787 publisher "Philadelphia : University of Pennsylvania press,".
- 41009787 subject "QL775 .J4".
- 41009787 subject "Unicellular organisms.".
- 41009787 title "The beginnings of social behavior in unicellular organisms, by Herbert S. Jennings.".
- 41009787 type "text".