Title: A.O. i V.O. Kovalevskie--perepiska, 1867-1875 gg
Subjects: Correspondence, Biology, Paleontology, Paleontologists, Embryology, Embryologists
People: A. O. Kovalevskiĭ (1840-1901), Vladimir Onufrievich Kovalevskiĭ (1842-1883)