Institutio astronomica, juxta hypotheseis tam veterum quam Copernici & Tychonis
Institutio astronomica, juxta hypotheseis tam veterum quam Copernici & Tychonis
Space travel and future research into structure of universe
The Symposium on the Use of Space Vehicles at the Fall 1958 URSI Meeting
Astronomical measurements with rockets, satellites and balloons
Selenography: Physical Characteristics of the Moon; a Bibliography 1200-1958