Engelman, R. E.; Lewis, R. E. & Stromswold, D. C. Calibration models for measuring moisture in unsaturated formations by neutron logging, report, October 1995; (https://digital.library.unt.edu/ark:/67531/metadc624621/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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