Aqualung diving a complete and practical guide to the underwater world /
Kenyon, Ley.
Haas, Werner de.
Knorr, Fredy.
Brown, G. F.
London Allen & Unwin
1970
Originally published as 'Tauch mit'. Rus̈chlikon bei Zurich: Albert Mul̈ler, 1959
bibl p334-336
Diving, Submarine.
Fishes.