Sub aqua /
Brookes, George F.(George Frederick)1920-
Matkin, Robert B.(Robert Broadbent),1919-
Brookes, George F.(George Frederick)Underwater swimming.
£1.75 : CIP revised.
Previous edition: id est revised edition, published as Underwater swimming. Wakefield : EP Publishing, 1976.
Text and ill on inside cover.
Includes index.
Skin diving.