Prokhorov, A. M. (1973). Great Soviet encyclopaedia. 23v, eng.
Chicago Edition CitationProkhorov, A. M. Great Soviet Encyclopaedia. 23v, Eng. 1973.
MLA Edition CitationProkhorov, A. M. Great Soviet Encyclopaedia. 23v, Eng. 1973.
Warning: These citations may not always be 100% accurate.