[On the principles of epidemiologic cancer research in the German Democratic Republic].
D004812:Epidemiologic Methods; D005859:Germany, East; D008499:Medical Records; D009369:Neoplasms / Q000209:etiology / Q000401:mortality; D012106:Research; D013223:Statistics as Topic
Uber die Grundlagen der epidemiologischen Krebsforschung in der Deutschen Demokratischen Republik.