Flora of the U.S.S.R.
Volumes 1-30 and index of volumes 1-30. In English, translated from Russian, in PDF formats. (1968). By: Botanicheskii institut (Akademiia nauk SSSR). - Mifal tirgume ha-mada ha-Yisreeli. - Smithsonian Institution. Libraries. Publication info: Springfield Va: Israel Program for Scientific Translations; 1968.