Previous ed.: published as 'The British Sub Aqua Club snorkelling manual. 1974'.
Includes index.
Snorkelling manual : a guide to snorkel diving techniques for the use of instructors and pupils in the BS-AC National Snorkellers Club by Lionel F. Blandford. ISBN 0902988158. Published by British Sub-Aqua Club in 1976. Publication and catalogue information, links to buy online and reader comments.