Yazar
Norman Sperling
3 cilt bulundu.
Cilt sonuçları
How and why to make a user-friendly sidewalk telescope
John L. Dobson, Norman Sperling · Everything in the Universe
165 sayfa · 1991
Amateurs' manuals / Astronomers / Astronomy / Biography / Design and construction
This book warps space and time
Norman Sperling · Andrews McMeel Pub.
283 sayfa · 2008
Science / Humor / American wit and humor, science