{"id":"000030703","type":"book","title":"Differential mortality among the sexes in childhood and its possible significance in human evolution. - Washington, D.C","container-title":"Proceedings of the National Academy of Sciences ; 49.1963, no. 4, S. 425-429 : 2 Tab","author":[{"family":"Cowgill","given":"Ursula M."}],"issued":{"raw":"1963"}}