00327nam a2200121Ia 4500 3052 3052 200103s 1980 ||||xx |||||||||||||| ||und|| 623.894 MER Merrifield, F. G. Ship magnetism and the Magnetic Compass Pergamon Press 1980 London vii, 189p. BK 0 0 ddc 0 623_894000000000000_MER 0 NFIC 4154 MU MU GEN 2020-01-08 623.894 MER LBS7570 2025-03-17 BK Column-3