Note III-5 — Chapter III · AIR-BORNE UFOS: BALLOONS TO BUBBLES
Reading edition
Keyhoe, D. E. Flying Saucers from Outer Space. New York: Henry Holt & Co., 1953.
Reading edition
Keyhoe, D. E. Flying Saucers from Outer Space. New York: Henry Holt & Co., 1953.