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Physik in Unserer Zeit Published by: Weinheim, Wiley - V C H Verlag GmbH & Co. KGaA (Germany) Subject: Physics Language: German Published: 1969 ISSN: 0031-9252, 1521-3943 Available at 1 Universities. | |||
Astronomy and Astrophysics Published by: Berlin, European Southern Observatory (Germany) Subject: Astronomy Physics Published: 1969 ISSN: 0004-6361 Available at 4 Universities. |