Percov, L. A. (1964). Prirodnaja radioaktivnostʹ biosfery. Atomizdat.
Chicago Style (17th ed.) CitationPercov, Lev A. Prirodnaja Radioaktivnostʹ Biosfery. Moskva: Atomizdat, 1964.
MLA (9th ed.) CitationPercov, Lev A. Prirodnaja Radioaktivnostʹ Biosfery. Atomizdat, 1964.
Warning: These citations may not always be 100% accurate.