{"id":"001397275","type":"book","title":"The evolution of reciprocal altruism","publisher":"Harper & Row","publisher-place":"New York, Hagerstown, London","pages":"213-226","container-title":"The Sociobiology Debate. Readings on Ethical and Scientific Issues, (1978","author":[{"family":"Trivers","given":"Robert L."}],"issued":{"raw":"1978"}}