Reports on Astronomy/Proceedings of the Thirteenth General Assembly Prague 1967 | ISBN 9789401034760
Reports on Astronomy/Proceedings of the Thirteenth General Assembly Prague 1967
herausgegeben von L. Perek
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Reports on Astronomy/Proceedings of the Thirteenth General Assembly Prague 1967
herausgegeben von L. PerekCCXXIII, 1354 p.