VERTICAL-SLICE OCEAN-ACOUSTIC TOMOGRAPHY - EXTENDING ABEL INVERSION TO NON-AXIAL SOURCES AND RECEIVERS R.M. JONES, T.M. GEORGES, L. NESBITT, R. TALLAMRAJU and A. WEICKMANN J. Phys. Colloques, 51 C2 (1990) C2-1013-C2-1016 DOI: 10.1051/jphyscol:19902237