Friday, February 21, 2014

Astronomer Resources- Willem de Sitter

http://www.phys-astro.sonoma.edu/BruceMedalists/deSitter/

http://www.britannica.com/EBchecked/topic/546850/Willem-de-Sitter

http://www.nndb.com/people/209/000168702/
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)