@book {2460,
	title = {The sex contract : the evolution of human behavior},
	year = {1982},
	note = {Helen E. Fisherill. ; 25 cmIncludes indexBibliography: p. 233-240},
	pages = {253 p},
	publisher = {W. Morrow},
	organization = {W. Morrow},
	edition = {1st ed},
	address = {New York},
	keywords = {Anthropology, Culture, Evolution, Human evolution, Sex, Sexual Behavior, Social evolution},
	isbn = {068800640X},
	author = {Fisher, Helen E}
}
