[Hygienic problems of using excess active sludge in animal husbandry].
D000821:Animal Feed; D000822:Animal Husbandry; D000818:Animals; D006920:Hygiene; D013552:Swine; D014131:Trace Elements / Q000378:metabolism
D014131:Trace Elements
Gigienicheskie voprosy ispol'zovaniia izbytochnogo aktivnogo ila v zhivotnovodstve.