TY  - BOOK
AU  - Denne, W
TI  - Magnetic compass deviation and correction :  a manual of the theory of the deviations and mechanical correction of magnetic compasses in ships / by W. Denne.    
SN  - 851743323
AV  - VK 577 .D46 1979 
PY  - 1979///
PB  - Glasgow : Brown, Son & Ferguson
ER  -