Buffington, D. E., Bucklin, R. A., Henley, R. W., & McConnell, D. B. (2018). Fans For Greenhouses: AE12/AE020, 2/2008. EDIS, 2018(2). https://doi.org/10.32473/edis-ae020-2002 (Original work published July 7, 2002)