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01-22-14, 07:06 AM	#6
Herr-Berbunch Kaiser Bill's batman Join Date: May 2010 Location: AN72 Posts: 13,203 Downloads: 76 Uploads: 0	British Geographical Survey has a handy little calculator. Saves on the maths, and lessens the headache. http://www.geomag.bgs.ac.uk/data_ser.../gma_calc.html __________________

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