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Siegfried Marx

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Himmelsfotografie mit Schmidt-Teleskopen (German Edition)
Observatories of the world
Astrophotography: Proceedings of the IAU Workshop, Jena, GDR, April 21-24,1987
STERNWARTEN DER WELT
Astrophotography: Proceedings of the IAU Workshop, Jena, GDR, April 21–24,1987
Astrophotography Proceedings of the IAU Workshop, Jena, GDR, April 21–24,1987