Vigil, S.A. & Holter, G.M. Application of macro material flow modeling to the decision making process for integrated waste management systems, article, April 1, 1995; (https://digital.library.unt.edu/ark:/67531/metadc791573/m1/1/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .