The Helwan observatory photographs of comet Halley 1910 II /

Autor Knigge, Rüdiger
Vydáno 1979

Cometary missions : proceedings of a workshop on cometary missions, Bamberg, February 20-22, 1979 /

Vydáno 1979

The interaction of variable stars with their environment : proceedings of the IAU-Colloquium no. 42, Bamberg, September 6-9, 1977 /

Vydáno 1977