@inbook {309691, title = {Evolutionary obstetrics}, booktitle = {Evolutionary Medicine}, year = {1999}, note = {

ed. W. R.\ Trevathan, E. O. Smith, J. J. McKenna

}, pages = {407-427}, publisher = {Oxford University Press}, organization = {Oxford University Press}, address = {New York, NY}, author = {Trevathan, W.} }