TY - BOOK AU - Rozova AV TI - Biostratigraphic zoning and trilobites of the upper cambrian and lower ordovician of the NorthwEastern Siberian Platform U1 - 560.172 PY - 1984/// CY - Calcutta PB - Amerind Pub KW - Biostratigraphic KW - Paleontology KW - Paleozoic paleontology ER -