@inbook{Waldron1998, author = {Waldron, I.}, title= {Sex differences in infant and early childhood mortality: Major causes of death and possible biological causes}, year = {1998}, editor = {Lopez, A.D.}, editor = {Ruzicka, L.T. }, booktitle = {Too young to die: Genes or gender?}, address = {New York}, publisher = {United Nations}, pages = {64--83}, }