English Channel and approaches. Radiobeacons.
London :  Admiralty, 
1962.
Backed by: British Isles and North Sea. Radiobeacons. A reproduction, at a reduced scale, of Diagram No. 5477 in Admiralty List of Radio Signals Vol. 2, 1962.
In: Small Ships' Radio Telephone Handbook. Compiled by R.A.H. Collins and Thos. Cooper.