[Methodological characteristics of studying the morbidity of the ship's crew in the river fleet].
D000041:Absenteeism; D000328:Adult; D004812:Epidemiologic Methods; D006801:Humans; D009326:Naval Medicine; D009784:Occupational Diseases / Q000453:epidemiology*; D012800:Siberia
Metodicheskie osobennosti izucheniia zabolevaemosti plavsostava rechnogo flota.