Polezni izkopaemi na NR Bŭlgarii͡a︡
Subtitle: Tsvetni metali.
Publisher: Tekhnika
Published: 1960
Place of publication: Sofia
Language: bul
Number of pages: 131
Subjects: Nonferrous metals -- Bulgaria; Ore deposits -- Bulgaria
Notes: Bibliography: p. 118-120.
At head of title: Ĭovcho Sm. Ĭovchev.
Summaries in Russian and English.