4Cagniard L Basic theory of the magnetotelluric method of geophysical prospecting. Geophysics [ J ] . 1953, 18 ( 1 ) : 605 - 635.
5Kaufman A A, Keller G V. Frequency and Transient Soundings [ M]. Elsevier Science Publishes B. V, 1983.
6Seigel H O. Theoretical and experimental investigations into the applications of the phenomenon of overvotage to geophysical prospecting[ D]. Ph. D. thesis. Univ. of Toronto. 1949.
7Goldstein M A, Strangway D W. Audio -frequency magnetitellurics with a grounded - electric dipole source [J]. Geophysics, 1975, 40:669 -683.
