[Numeral variations of constant ectoparasites of vertebrates and their causes].
D000818:Animals; D006801:Humans; D010271:Parasites; D010274:Parasitology; D014714:Vertebrates
PARASITES; PARASITOLOGY
Kolebaniia chislennosti populiatsii postoiannykh naruzhnykh parazitov mlekopitaiushchikh i ikh prichiny.