Kazakov, V. G., & Kazakov, V. G. (1969). Der keshenever agent fun “iskra”. Soweṭiš heimland, 9, pp. 37-39.

Kazakov, Viktor Grigorevič, و Viktor Grigorevič Kazakov. "Der Keshenever Agent Fun “iskra”." Soweṭiš Heimland 9 (1969): 37-39.

Kazakov, Viktor Grigorevič, و Viktor Grigorevič Kazakov. "Der Keshenever Agent Fun “iskra”." Soweṭiš Heimland 9 (1969): 37-39.