See Allo

Laet, Rony De, author

The casual sky observer’s guide : stargazing with binoculars and small telescopes

Springer, 2012

eBooks

Henso, Truman, author

Binoculars telescopes and telescopic sights; how they work, howto selec them, and how to design and build your own

Greenberg, 1953

Buku Teks

Aiu Ahra, author

Gramedia Pustaka Utama, 2016

Buku Teks

Pugh, Philip, author

Observing the Messier objects with a small telescope : in the footsteps of a great observer

Springer, 2012

eBooks

The Yeungnam observer

Hyo-Soo Lee, President, 2009

Majalah, Jurnal, Buletin

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