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Author Title Year Publication Serial Volume Pages
Zahn-Waxler, C. & Radke-Yarrow, M. The development of altruism: Alternative research strategies. 1982 The development of prosocial behavior 5061 109-138
Boitani, L. Patterns of homesites attendance in two Minnesota wolf packs 1982 Wolves of the World: Perspectives of Behavior, Ecology and Conservation 6474