Blizost, koi͡a︡to obogati͡a︡va
By: [sŭstavil Ivan Ivanov].
Contributors: Ivanov, Ivan.; "T͡S︡iment i varodobiv," DSO (Bulgaria)
Publisher: DSO "T͡S︡iment i varodobiv,"
Published: 1981
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 112
Subjects: Cement plants.
Notes: Cover title.
"Za izuchavane i masovo vnedri͡a︡vane na polozhitelnii͡a︡ opit."