Demographic structure and opportunity for selection of Halfmoon Township, Pennsylvania: 1850-1900.
D001947:Breeding; D003710:Demography; D005260:Female; D005298:Fertility; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008297:Male; D009026:Mortality; D010414:Pennsylvania; D011157:Population Dynamics; D012424:Rural Population; D012641:Selection, Genetic