Pettyjohn, W. Randall. "Influence of physical, chemical and biological conditions on the infiltration rate of highway stormwater runoff." University of Georgia. Map and Government Information Library. 2017-02, https://dlg.galileo.usg.edu/do:dlg_ggpd_s-ga-bt700-pr4-bm1-b2017-bi54-belec-p-btext.

Pettyjohn, W. Randall (2017-02). Influence of physical, chemical and biological conditions on the infiltration rate of highway stormwater runoff. Retrieved from https://dlg.galileo.usg.edu/do:dlg_ggpd_s-ga-bt700-pr4-bm1-b2017-bi54-belec-p-btext

Pettyjohn, W. Randall. "Influence of physical, chemical and biological conditions on the infiltration rate of highway stormwater runoff." 2017-02. August 2, 2025. https://dlg.galileo.usg.edu/do:dlg_ggpd_s-ga-bt700-pr4-bm1-b2017-bi54-belec-p-btext.