@booklet {7907, title = {Jurassic system of Russia: problems of stratigraphy and paleogeography. Proceedings of the Third all-Russian Meeting. Saratov. Saratov, Saratov State University, September 23-27}, year = {2009}, note = {PDFIn Russian}, pages = {283}, publisher = {Nauka}, address = {Saratov}, keywords = {biogeography, fossil record, mollusca, oxytomidae, stratigraphy}, author = {Zakharov, V. A.} }