THE HOLLOW EARTH BIBLIOGRAPHY: An Updated , Annotated Listing of over 500 Books, essays, and articles concerning the Hollow Earth History.
Provo, UT: Bruce Walton, 1982. Second edition. Loose mimeographed sheets in folder; A VERY GOOD+ COPY. Anyone with an interest in researching Agartha, or the hollow earth theories in general, should have this scarce reference. (Item ID: 14094)