Geophysical Studies of North African Cenozoic Volcanic Areas I: Haruj Assuad, Libya Ade-Hall, J. M. ; Reynolds, P. H. ; Dagley, P. ; Mussett, A. E. ; Hubbard, T. P. ; Klitzsch, Eberhard Abstract Publication: Canadian Journal of Earth Sciences Pub Date: July 1974 DOI: 10.1139/e74-096 Bibcode: 1974CaJES..11..998A