Invisible barriers
By: David Osborne.
Publisher: Avalon Books
Published: 1958
Place of publication: New York
Language: eng
Number of pages: 223
Notes: Currey, L.W. Science fiction, p. 437
This edition is known to exist in at least two states: one with the t.p. and p. 7 transposed at the press and the other with the error corrected.
HRC has a copy of each state.