00609naa#a2200169#i#450# EN\INFRA-M\bibl\11865 20240518141826.6 1998-0744 20160418b2016####ek#y0engy0150####ca RUS RU Education Materials Supply of Extracurricular Institutions of Acological and Naturalistic Profile in Ukraine (the Second Half of the 20th Century — the Beginning of the 21st Century) Journal article Moscow INFRA-M Academic Publishing LLC. 2016 6 с. Journal article local Cherkashina L. naukaru.ru