L. Berg. In memory of P. G. Ignatov. (1874–1902).

PB

From the content: study of Lake Teletsky in Altai in the summer of 1901 / P. G. Ignatov (p. 171-205);Memory of P. G. Ignatov (1874-1902) / L. Berg (pp. 621-628), (and other materials)