TY  - BOOK
TI  - Admiralty list of radio signals, volume 6, part 4 : pilot services, vessel traffic services and port operations: Indian Sub-continent, South East Asia
U1  - M 623.89 A2388 2013 
PB  - The United Kingdom Hydrographic Office.
KW  - Radio in navigation
N1  - 600 Technology (App Sciences)
ER  -