Tombaugh, Clyde William, 1906-1997; Arnold, G. P.; Breck, Louis W.; Brown, T. Townsend; Carrouges, Michel, 1910-1988; Collings, Fred; Coyne, Dolores M., Mrs.; Daughters, Dave; Egan, John D., Jr.; Fawcett, George D.; Davis, Marion N.; Gariety,...
Unidentified flying objects; Tombaugh, Clyde William, 1906-1997; Literature and myth; Hypothesis; Visual perception; Possibility; Unidentified flying objects--Sightings and encounters; Apologies; Language and languages; Manuscripts; Belief and...
Tombaugh, Clyde William, 1906-1997; Nicolaisen, Edilfe; Norwine, James R.; Pasachoff, Jay M.; Pittinger, P. D.; Pruett, J. Hugh; Schumacher, Heinrich; Sparks, John C.; Stockman, Victor E., Mrs.; Swihart, Ernest W. (Ernest Walter), 1942-.; Wright,...
Clippings (Books, newspapers, etc.); Satellites; Errors; Unidentified flying objects--Sightings and encounters; Tombaugh, Clyde William, 1906-1997; Publishers and publishing; Spiritual life--New Age movement; Lorenzen, Coral E., 1925-; Unidentified...
Mars (Planet)--Charts, diagrams, etc.; Mars (Planet); Mars (Planet)--Polar regions; Mars (Planet)--Meteorology; Mars (Planet)--Atmosphere; Earth (Planet); Mars (Planet)--Temperature; Kuiper, Gerard P. (Gerard Peter), 1905-1973; Mars...