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- 89104265 contributor B5910848.
- 89104265 created "1987.".
- 89104265 date "1987".
- 89104265 date "1987.".
- 89104265 dateCopyrighted "1987.".
- 89104265 description "Includes bibliographical references.".
- 89104265 extent "61 p. :".
- 89104265 issued "1987".
- 89104265 issued "1987.".
- 89104265 language "bul".
- 89104265 spatial "Bulgaria.".
- 89104265 subject "Ecology Study and teaching Bulgaria.".
- 89104265 subject "Ecology Study and teaching.".
- 89104265 subject "QH541.2 .K67 1987".
- 89104265 title "Model na ekologichnoto obrazovanie v edinnoto sredno politekhnichesko uchilishte / Zdravka Kostova.".
- 89104265 type "text".