Report of the twenty-third session, Czechoslovakia, 1968.
Publisher: Academia
Published: 1968
Place of publication: Prague
Language: eng
Subjects: Geology -- Congresses.
Genres: Congresses.
Notes: English, French, German, Italian, Russian, or Spanish.

Some vols. have title: Proceedings of sections, others entitled Proceedings of symposiums.

Bibliogr.

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