Helmberger, Donald V.; Tromp, Jeroen & Rodgers, Arthur J. ADVANCED WAVEFORM SIMULATION FOR SEISMIC MONITORING EVENTS, report, June 30, 2007; (https://digital.library.unt.edu/ark:/67531/metadc888340/m1/1/: accessed June 15, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .