title: Differential age effects in seasonal variation of mortality in a rural Zapotec-speaking municipio, 1945-1970.
mesh_terms: D000367:Age Factors; D005767:Gastrointestinal Diseases / Q000453:epidemiology; D049673:History, 20th Century; D006801:Humans; D008800:Mexico; D009026:Mortality; D012424:Rural Population; D012621:Seasons