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- 79386087 contributor B3663150.
- 79386087 contributor B3663151.
- 79386087 created "1978.".
- 79386087 date "1978".
- 79386087 date "1978.".
- 79386087 dateCopyrighted "1978.".
- 79386087 description "Includes bibliographical references.".
- 79386087 extent "127, 22 p. ;".
- 79386087 issued "1978".
- 79386087 issued "1978.".
- 79386087 language "bul".
- 79386087 publisher "Sofii︠a︡ : Nauchnoizsledovatelski in-t po obrazovanieto T. Samodumov,".
- 79386087 subject "Environmental policy Study and teaching.".
- 79386087 subject "Environmental protection Study and teaching.".
- 79386087 subject "HC79.E5 K67".
- 79386087 title "Sistema na prirodozashtitnite poni︠a︡tii︠a︡ v obuchenieto / Zdr. Kostova, L. Naĭdenova, M. Dodova.".
- 79386087 type "text".