TY  - BOOK
AU  - Subramaniam,H.
TI  - Nautical watchkeeping / 
U1  - 623.893 23
PY  - 1992///.
CY  - Mumbai : 
PB  - Vijaya publications, 
KW  - Merchant marine -- Watch duty.
KW  - Nautical watchkeeping.
KW  - Keeping cargo watch.
ER  -