TY  - BOOK
AU  - Milligan, John E
AU  - 
TI  - Celestial navigation by H.O.249
U1  - 527(026) 
PY  - 1974///
CY  - Cambridge
PB  - Maritime press
KW  - celestial navigation
KW  - Navigation
KW  - Nautical astronomy
KW  - Aeronautical astronomy
ER  -