Author:David Scot Francis Portree
David Scot Francis Portree
Works
[edit]- Humans to Mars: Fifty Years of Mission Planning, 1950-2000
- Mir Hardware Heritage
- NASA's Origins and the Dawn of the Space Age
- Orbital Debris: A Chronology
- Walking to Olympus: An EVA Chronology
Some or all works by this author are in the public domain because they were created by the United States National Aeronautics and Space Administration (NASA), whose copyright policy states that "NASA material is not protected by copyright unless noted".
Please note that use of NASA logos is restricted by law, but these are not copyright restrictions.
Public domainPublic domainfalsefalse