00351nam a2200121Ia 4500008004100000040001700041082000900058110004600067245003000113260002900143300001600172650004100188190329s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221st  aIndian Institute of Geomagnetism (Colaba) 0aIndian magnetic data 1997  aMumbaibthe Authorc1997  axxxii,219p.  a523.01880954083, Magnetic data-India