Ekologiia i ikonomika
By: Todor Bozhinov ... [et al.] ; pod nauchnoto rukovodstvo na Todor Bozhinov i obshtata redaktsiia na Todor Bozhinov i Ivan Atanasov
Publisher: Zemizdat
Published: 1990
Place of publication: Sofiia
Language: bul
Number of pages: 238
Subjects: Ecology; Economic aspects