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| Author | Title | Year | Publication | Serial | Volume  |
Pages |
|---|---|---|---|---|---|---|
| Hoff, M.P.; Nadler, R.D.; Maple, T.L. | Development of infant independence in a captive group of lowland gorillas | 1981 | Developmental Psychobiology | 4170 | 14 | 251-265 |
| Nadler, R.D. | The Orangutan: Its Biology and Conservation | 1982 | 4891 |