TY  - BOOK
TI  - Second-class radioelectronic certificate for global maritime distress and safety system radio personnel : : course and compendium. 
SN  - 9280151185
U1  - 623.856 
PY  - 2002///
CY  - London : 
PB  - International Maritime Organization , 
KW  - GMDSS Radio Personnel Certification
ER  -