Kulkarni, Atul Azimuth calibration and gradient survey for magnetic observatories under Indian Institute of Geomagnetism Atul Kulkarni and Anil Iype - Mumbai IIG 2020 - 79 p. col.fig. Technical Report Subjects--Topical Terms: Azimuth CalibrationGradient SurveyMagnetic ObservatoriesTechnical ReportTechnical Report Universal Decimal Class. No.: 550.380.2(047.34) / KUL