[Natural foci of infection of some helminthoses].
D004443:Echinococcosis / Q000453:epidemiology*; D006373:Helminthiasis; D006801:Humans; D014235:Trichinellosis / Q000453:epidemiology*
ECHINOCOCCOSIS/epidemiology; TRICHINOSIS/epidemiology
K voprosu o prirodnoi ochagovosti nekotorykh gel'mintozov.