List of holders : Bentley's second phrase code : including all names registered between 28th August, 1931 and 31st December, 1932 only : supplementary /
Bentley, E. L.,compiler.
Cover title.
"10th January, 1933"--Cover.
"List (No. 4)"
Supplement to 3.
"As notified since List No. 3 and before 31st December, 1932"--Page [3]
"This list contains the names only of such firms as have sent in registration cards or have definitely advised us that they are actual holders of the code."
Cipher and telegraph codes.