TY  - BOOK
AU  - Zanelli,Leo
TI  - Teach yourself underwater swimming
T2  - The Teach yourself books
AV  - GV840.S78 Z3
U1  - 797.23 
PY  - 1967///
CY  - London
PB  - English Universities P.
KW  - Skin diving
KW  - Scuba apparatus
N1  - Bibliography: p. [172]-174
ER  -