Singh, B. P.; Rajaram, Mita; Basavaiah, N.; Nagar, V. K.; Rajal, B. S.
(1992)
The five candidate models for DGRF 1985 and IGRF 1990 developed by IZMIRAN, US/UK, USGS and two models of GSFC, are assessed over the Indian region, using observatory and repeat survey stations data for period 1985-1990. ...