TY  - BOOK
AU  - Murray, Alan
AU  - Murray, Alan
TI  - Astro-navigation :  from square one to ocean-master / Alan Murray.    
SN  - 9780755206483
AV  - VK555 .M961 2011 
U1  - VK555 .M961 2011 
PY  - 2011///
PB  - Bedfordshire, England : Authors On Line
ER  -