Ėkologicheskie osnovy okhrany i ra︠t︡sionalʹnogo ispolʹzovani︠i︡a khishchnykh mlekopita︠i︡ushchikh : materialy vseso︠i︡uznogo soveshchani︠i︡a - Sokolov, Vladimir Evgenʹevich (Izd-vo "Nauka", 1979)