TY - BOOK AU - Gnilovskaya,M.B. AU - Urbanek,Adam TI - Upper Precambrian and Cambrian Palaeontology of the East-European Platform - Contribution of the Soviet-Polish working group on the Precambrian-Cambrian boundary problem PY - 1983/// CY - Warszawa PB - Publishing House Wydawnictwa Geologiczne ER -