Nat͡sionalna teoretichna konferent͡sii͡a po opazvane i vŭzproizvodstvo na obkrŭzhavashtata sreda
Subtitle: 1-5 noemvri 1982, Slŭnchev bri͡ag.
Publisher: s.n.
Published: 1982
Place of publication: Bulgaria
Language: bul
Subjects: Environmental protection -- Bulgaria -- Congresses.; Environmental policy -- Bulgaria -- Congresses.
Other titles: Bŭlgarska akademii͡a na naukite.
Notes: Includes bibliographies.
At head of title: Bŭlgarska akademii͡a na naukite ....