The blue ray
By: by Flight-Lieut. S. C. George
Series: Three star books
Publisher: Frederick Warne & Co. Ltd.
Published: 1938
Place of publication: London; New York
Language: eng
Number of pages: 190
Subjects: English Science fiction
Notes: Date taken from: R. Reginald. Science fiction and fantasy literature : a checklist 1700-1974. Gale Research Co., 1979.

Bleiler, E. F.  Checklist of science-fiction & supernatural fiction, p. 80

Reginald, R.  Science fiction and fantasy literature, p. 206