Martinez, D.; Kane, J. O.; Heeter, R.; Casner, A. & Mancini, R. LBS GatlingGun13A, report, October 9, 2013; (https://digital.library.unt.edu/ark:/67531/metadc870034/m1/1/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .

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