~ gathering this author’s shelf ~
10 bookswriting since 190763 years at work
Fundamental Formulas of Physics
1955
A Field Guide to the Stars and Planets
1964
Astronomy
1970
Mathematical Physics
1953
Our sun.
1949
Forbidden Lines in Astrophysical Sources
1933
On the Interpretation of Nova Spectra
1933
The Terrestrial Abundance of the Permanent Gases
1933
Stars and planets
1931
The Friendly Stars
1907