Zanelli, Leo.
Teach yourself underwater swimming / [by] Leo Zanelli. - London : English Universities Press, 1967. - x, 181 p. : ill. ; 19 cm. - The teach yourself books .
Includes index.
Bibliography: p. [172]-174.
Skin diving--Handbooks, manuals, etc.
Scuba apparatus.
Teach yourself underwater swimming / [by] Leo Zanelli. - London : English Universities Press, 1967. - x, 181 p. : ill. ; 19 cm. - The teach yourself books .
Includes index.
Bibliography: p. [172]-174.
Skin diving--Handbooks, manuals, etc.
Scuba apparatus.