TY  - BOOK
TI  - Admiralty list of radio signals volume 6, part 5 : pilot services, vessel traffic services and port operations: North America, Canada and Greenland
U1  - M 623.89 Ad6 2012 
PB  - The United Kingdom Hydrographic Office.
KW  - Radio in navigation
N1  - 600 Technology (App Sciences)
ER  -