garet epifanio osuna paezat arizona.openrepository.com azu_td_3050352_sip1_. - The University of Arizona Campus . Anthropogenic sources of coastal eutrophication in Mexico (Paez-Osuna 28 et al. 1998) . In 1968, Garrett Hardin wrote 'The Tragedy of the Commons,' in which he . Fantle, M. S., A. I. Dittel, S. M. Schwalm, C. E. Epifanio and M. L. Fogel.