Jacobs, H.R. Manual for the thermal and hydraulic design of direct contact spray columns for use in extracting heat from geothermal brines, report, June 1, 1985; (https://digital.library.unt.edu/ark:/67531/metadc1069762/m1/3/: accessed May 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .