Bibliography: leaves 238-257. / ix, 257 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Develops a tomographic seismic inversion scheme that makes use of first arrivals and later arrivals simultaneously ; is easier to analyse in terms of convergence, stability and uniqueness of solutions; and is a proper non-linear inversion scheme. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Geophysics, 1998?