The works of the Geological and Mineralogical Museum named after Peter the Great Academy of Sciences of the Union of Soviet Soci...

Geological and Mineralogical Museum.(Leningrad).The works of the Geological and Mineralogical Museum named after Peter the Great Academy of Sciences of the Union of Soviet Socialist Republics.Leningrad, 1916-1926.Gecker, R.F.T.4. 1919-1923.Ext.1: Echinosferides of Russian Silur.Petrograd: Ros.state.Acad.Type., 1923.