title: Secular trends in mortality in the Connecticut Valley, 1700-1850.
mesh_terms: D000367:Age Factors; D005260:Female; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D008297:Male; D008404:Massachusetts; D009017:Morbidity; D009026:Mortality; D012424:Rural Population; D012737:Sex Factors; D013997:Time Factors