Lober, Douglas J. (1998). "Pollution prevention as corporate entrepreneurship". Journal of Organizational Change Management. 11 (1): 26–37. doi:10.1108/09534819810369554. ISSN0953-4814.
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Theilmann, John (2017). "U.S. Clean Air Acts". Salem Press Encyclopedia of Science. Retrieved 13 April 2019.
Lober, Douglas J. (1998). "Pollution prevention as corporate entrepreneurship". Journal of Organizational Change Management. 11 (1): 26–37. doi:10.1108/09534819810369554. ISSN0953-4814.