| Title: | Twins: Heredity and Environment |
| Author: | Hirsch, Nathaniel D. Mttron (Nathaniel David Mttron), 1896-1984 |
| Note: | Cambridge, MA: Harvard University Press, 1930 |
| Link: | page images at HathiTrust |
| Stable link here: | https://onlinebooks.library.upenn.edu/webbin/book/lookupid?key=olbp89002 |
| Subject: | Twins |
| Subject: | Heredity |
| Subject: | Human beings -- Effect of environment on |
| Call number: | GN295 .T9 H5 |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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