Hewlett, E. M.; Erickson, M. V.; Ferguson, C. D.; Sherwood, P. B.; Boswell, B. S.; Walter, K. M. et al. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report, report, July 1, 1983; (https://digital.library.unt.edu/ark:/67531/metadc874948/m1/63/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .