TY - BOOK AU - Semikhatov,M.A. TI - Conophytons in the Ryphean of the USSR and their stratigraphic importance: Transactions T2 - 10e Colloque de GĂ©ologie Africaine, Montpellier 25-28 avril 1979 PY - 1965/// PB - Publishing Office Science, Moscow KW - Conferences - Meetings ER -