- AFU Shop
- Bags
- Postcards
- Posters & DVD
- AFU Free items
- AFU Sponsorship
-
Books from AFU
- Anthologies & yearbooks
- Aviation techniques & history
- Bibliographies & indexes
- Biographies
- Conferences & congresses
- Dissertations
- Encyclopedias & directories
- Guides & manuals
- Skeptics & critics
- Statistics & computers
- UFOs
- Ancient cultures & astronauts
-
Mythology and folklore
-
Fortean phenomena
-
Paranormal phenomena
-
Other
-
Magazines & newsletters from AFU
- UFO-Sweden Shop
-
Materials in non-English languages
Smith, Warren: This hollow Earth (Pb)
1977, Sphere, London
Paperback, 188 pages
ISBN: 0-7221-7937-5
Paperback, 188 pages
ISBN: 0-7221-7937-5