Linda T. Elkins-Tanton - The Sun, Mercury and Venus.pdf

Linda T. Elkins-Tanton - The Earth and the Moon.pdf

David Levy’s Guide to Variable Stars.pdf

Heifetz, Milton D. - A Walk through the Southern Sky.pdf

Harrington_P_Touring_the_Universe.pdf

Haas, Sissy - Double Stars for small telescopes.pdf

Good, Gerry A. - L’osservazione delle stelle variabili.pdf

Deep Sky Observer's Handbook vol.1 Double Stars.pdf

Garrett Serviss - Astronomy with the Naked Eyes (1908).pdf

Mullaney, James - Celestial harvest.pdf

Reddy,_Francis_Celestial_Delights_The.pdf

Schaaf,_Fred_The_50_Best_Sights.pdf

Mobberley, Martin - Supernovae and How to Observe Them.pdf

Mobberley,_Martin_Total_Solar_Eclipses.pdf

Gainer, Michael K. - Real Astronomy With Small Telescopes.pdf

Cooke,_Anthony_Visual_Astronomy.pdf

Benton, Julius L. - Saturn and How to Observe It.pdf

Bradt_Hale_Astronomy_Methods_A_Physical.pdf

Bakich,_Michael_E_1,001_Celestial.pdf

Borgia,_Michael_P_Human_Vision_and.pdf