Helmut K. Wimmer

3 books

Amateur Astronomy Pocket Skyguide by Helmut K. Wimmer, Mark R. Chartrand
Amateur Astronomy Pocket Skyguide
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Helmut K. Wimmer, Mark R. Chartrand

Amateur Astronomy Pocket Skyguide

Helmut K. Wimmer, Mark R. Chartrand

288 pages • missing pub info (editions)

medium-paced
Mars, Planet Number Four by Franklyn M. Branley, Helmut K. Wimmer

Mars, Planet Number Four

Franklyn M. Branley, Helmut K. Wimmer

116 pages • first pub 1962 (editions)

medium-paced
The Nine Planets by Franklyn M. Branley, Helmut K. Wimmer
The Nine Planets
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Franklyn M. Branley, Helmut K. Wimmer

The Nine Planets

Franklyn M. Branley, Helmut K. Wimmer

99 pages • first pub 1978 (editions)