TY  - BOOK
AU  - Dubey,C.L.
TI  - Celestial navigation [solution] for deck officers / 
U1  - 623.89 23
PY  - 2008///.
CY  - Mumbai : 
PB  - Marine aid, 
KW  - Plotting of position llines.
KW  - High altitude observation.
KW  - SMT Meridian observation.
ER  -