The changing anatomic distribution of adenocarcinoma of the colon and rectum 1955-1980.
D000230:Adenocarcinoma / Q000473:pathology*; D003110:Colonic Neoplasms / Q000473:pathology*; D006801:Humans; D009329:Nebraska; D012004:Rectal Neoplasms / Q000473:pathology*; D012189:Retrospective Studies