'A Bison Book'.
'Signal' was published fortnightly from April 1940 to March 1945. - 'This facsimile edition is based on "Signal" as produced for the Channel Islands from "Signal"'s editorial office in Paris' - Introduction.
'Signal', years of triumph, 1940-42 : Hitler's wartime picture magazine. ISBN 0600382826. Published by Hamlyn in 1978. Publication and catalogue information, links to buy online and reader comments.