Denne W
Magnetic Compass Deviation And Correction:A Manual Of The De Viations And Mechanical Correction Of Magnetic Compasses In - 0 - Glasgow Brown,Son & Ferguson Ltd 1951 - ,;ill.
0 85174 332 3
MAGNETIC DECLINATION
Magnetic Compass Deviation And Correction:A Manual Of The De Viations And Mechanical Correction Of Magnetic Compasses In - 0 - Glasgow Brown,Son & Ferguson Ltd 1951 - ,;ill.
0 85174 332 3
MAGNETIC DECLINATION