chief editor, Yu.A. Orlov ; deputy chief editors, B.P. Markovskii, V.E. Ruzhentsev and B.S. Sokolov ; volume editor, B.S. Sokolov. -- Israel Program for Scientific Translations, 1971. -- (Fundamentals of paleontology : a manual for paleontologists and geologists of the USSR / Yu.A. Orlov ; v. 2).