00967nam0 2200277 450 00002373820090302122824.020090302d1957----km-y0itay50------baengUSaf------001yyDirections for magnetic measurementsby Daniel L. Hazard3rd ed. corr.WashingtonGovernment printing office1957IV, 129 p., [8] c. di tav.ill.24 cmIn testa al front.: Department of commerce and Coast and geodetic surveyDirections for magnetic measurements44570Magnetismo terrestreMisurazioni53818MagnetismoHazard,Daniel L.070633140ITUNIPARTHENOPE20090302RICAUNIMARC000023738S 538/23S C 59DSA2009S 538/26S A 483DSA2009Directions for magnetic measurements44570UNIPARTHENOPE