Geochemical aspects of the epidemiology of malignancies.
D005504:Food Analysis; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D012987:Soil / Q000032:analysis; D014131:Trace Elements / Q000032:analysis*; D014586:USSR; D014867:Water / Q000032:analysis
D012987:Soil; D014131:Trace Elements; D014867:Water