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- 91150830 contributor B6475160.
- 91150830 contributor B6475161.
- 91150830 created "1990.".
- 91150830 date "1990".
- 91150830 date "1990.".
- 91150830 dateCopyrighted "1990.".
- 91150830 description "Includes bibliographical references.".
- 91150830 extent "285 p. :".
- 91150830 issued "1990".
- 91150830 issued "1990.".
- 91150830 language "bul".
- 91150830 publisher "Sofii︠a︡ : [s.n.],".
- 91150830 spatial "Bulgaria".
- 91150830 subject "Individualized instruction Congresses.".
- 91150830 subject "Physics Study and teaching Bulgaria Congresses.".
- 91150830 subject "QC47.B9 N37 1990".
- 91150830 type "text".