00448nam a2200157Ia 4500003000900000008004100009040001600050080001600066100002300082245006200105260003200167300001600199490003900215650001700254650001900271IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a550.38bSTR  aStrangway, David W 0aHistory of the earth's magnetic fieldcDavid W. Strangway  aNew YorkbMcGraw-Hillc1970  aviii, 168p.  aEarth and planetary science series  aGeomagnetism  aPaleomagnetism