Da pregradim pŭti͡a︡ na ekologichnata kriza
By: Sava Popov.
Publisher: Obshtonar. kom-t za opazvane i vŭzproizvodstvo na prirodnata sreda
Published: 1989
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 60
Subjects: Human ecology.