TY  - BOOK
AU  - Witherby Seamanship
AU  - Witherby Seamanship
TI  - Passage planning guide :  Malacca and Singapore Straits.    
SN  - 9781856093781
AV  - VK545 .W774 2011 
U1  - VK545 .W774 2011 
PY  - 2011///
PB  - Edinburg : Witherby Publishing Group
ER  -