Bunge, N. K. 1., & Snow, G. E. (1981). The years 1881-1894 in Russia--a memorandum found in the papers of N. Kh. Bunge: A translation and commentary. Philadelphia: American Philosophical Society.

Bunge, N. Kh. 1823-1895., and George E. Snow. The Years 1881-1894 in Russia--a Memorandum Found in the Papers of N. Kh. Bunge: A Translation and Commentary. Philadelphia: American Philosophical Society, 1981.

Bunge, N. Kh. 1823-1895., and George E. Snow. The Years 1881-1894 in Russia--a Memorandum Found in the Papers of N. Kh. Bunge: A Translation and Commentary. Philadelphia: American Philosophical Society, 1981.