TY - BOOK AU - Kulkarni, Atul AU - Iype, Anil TI - Azimuth calibration and gradient survey for magnetic observatories: under Indian Institute of Geomagnetism PY - 2020/// CY - Mumbai PB - IIG KW - Azimuth CalibrationGradient SurveyMagnetic ObservatoriesTechnical ReportTechnical Report N1 - Technical Report ER -