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This is the fourth report of the Japan-India Joint Project in Primates Investigation.
The field work on which this report is based was financed by a Rockefeller Foundation grant for the behavioral study of Indian monkeys (RF 60229).
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Sugiyama, Y. On the social change of hanuman langurs (Presbytis entellus) in their natural condition. Primates 6, 381–418 (1965). https://doi.org/10.1007/BF01730356
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DOI: https://doi.org/10.1007/BF01730356