From the Centers for Disease Control and Prevention. Fatalities attributed to entering manure waste pits--Minnesota, 1992.
D000062:Accidents, Occupational / Q000401:mortality*; D000328:Adult; D000383:Agriculture; D001237:Asphyxia / Q000209:etiology / Q000401:mortality; D006801:Humans; D006862:Hydrogen Sulfide / Q000506:poisoning; D008297:Male; D008372:Manure; D008875:Middle Aged; D008910:Minnesota / Q000453:epidemiology; D016273:Occupational Exposure / Q000009:adverse effects / Q000706:statistics & numerical data*; D012037:Refuse Disposal / Q000706:statistics & numerical data
D008372:Manure; D006862:Hydrogen Sulfide