A reprint of the English text of the work originally published in 1940, with text in Russian and English, as pt. 2, v. 5 of Travaux de l'Institut Zool...
A reprint of the English text of the work originally published in 1940, with text in Russian and English, as pt. 2, v. 5 of Travaux de l'Institut Zoologique de l'Academie des Sciences de l'URSS.