Note on the Problem of Great Stellar Distances
Harlow Shapley
The Next Fifty Years: Science in the First Half of the Twenty-First ...
John Brockman
A Commentary on Jean-Paul Sartre's Critique of Dialectical Reason, ...
Joseph S. Catalano
30 Essential Skills for the Qualitative Researcher
John W. Creswell
Thrice Greatest Hermes: Studies in Hellenistic Theosophy and ...
Hermes Trismegistus & G. R. S. Mead
A Dictionary of Space Exploration
Stephen O'Meara & E. Julius Dasch
Oxford Quick Reference Online (1)