00541nam a2200181Ia 4500 IN-BaIIA 211028s9999 xx 000 0 eng d IIA Library 538 HAZ Hazard, Daniel L 2129 Directions for magnetic measurements Daniel L Hazard 3rd ed. Washington U. S. Department of Commerce 1930 vi, 129p. U.S. department of commerce; 166 Magnetism 56 BK 985 985 0 0 0 0 BAN BAN GEN 0000-00-00 0 538/ HAZ 1026 2021-11-05 0000-00-00 BK