|
*** |
1 - Ed.orig.: Beyond Earth: The Future of Humans in Space, Bob Krone
(2006)
Collector's Guide Publishing Inc [english]
- saggistica, H+
|
|
|
** |
2 - Ed.orig.: Entering Space: Creating a Spacefaring Civilization, Robert Zubrin
(2000)
Tarcher [english]
- saggistica, H+
|
|
|
* |
3 - Ed.orig.: Return to the Moon: Exploration, Enterprise, and Energy in the Human Settlement of Space, Harrison H. Schmitt
(2006)
Springer [english]
- saggistica, C
|
|
|
**** |
4 - Ed.orig.: The Survival Imperative: Using Space to Protect Earth, William E. Burrows
(2005)
Oxford University Press, USA [english]
- saggistica, H+
|