TY  - BOOK
AU  - Denne,W.
TI  - Magnetic compass deviation and correction : : a manual of the theory of the deviation and mechanical correction of magnetic compasses in ships / 
U1  - 623.892 23
PY  - 1977///.
CY  - Glasgow : 
PB  - Brown, Son & Ferguson Ltd, 
KW  - Magnetic measurement.
KW  - The Earth's Magnetism.
ER  -