TY - BOOK AU - Parkinson, W. D. TI - An analysis of the geomagnetic diurnal variation during the international geophysical year T2 - Bulletin Australia. Bureau of Mineral Resources, Geology and Geophysics SN - 642021864 PY - 1977/// CY - Canberra PB - Australian Government Publishing Service KW - Diurnal VariationGeomagnetic Variation N1 - Department of National Resources: Bureau of Mineral Resources Geology and Geophysics ER -