@book{512, author = {IAGA Workshop on Electromagnetic Induction in the Earth and Ádám, A. and International Association of Geomagnetism and Aeronomy.}, title = {Electromagnetic induction in the earth :}, publisher = {Akadémiai Kiadó,}, year = {1976-1977.}, address = {Budapest :}, note = {Special issue of Acta geodaetica, geophysica et montanistica, t. 11, fasc. 3-4 and t. 12, fasc. 1-3.} }