TY  - BOOK
AU  - Hobbs, Richard R.
TI  - Marine navigation: piloting and celestial and electronic navigation 
SN  - 1-55750-381-8
PY  - 1998///
KW  - Navigation
KW  - sears
KW  - Pilots and pilotage
KW  - Nautical astronomy
N1  - Includes index
ER  -