At head of title: Nat︠s︡ionalʹnyĭ geokriologicheskiĭ fond. Moskovskiĭ gosudarstvennyĭ otkrytyĭ pedagogicheskiĭ universitet im. M.A. Sholokhova. Nauchno-proizvodstvennyĭ ėkologicheskiĭ t︠s︡entr "Pasʹva". Moskovskai︠a︡ obshchestvennai︠a︡ ėkologicheskai︠a︡ organizat︠s︡ii︠a︡ "Istrit︠s︡a". Includes bibliographical references (pages 222-229).
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