1. Bennett R. A. (1990). Executive summary research highlights fiscal year 89–90 new product application and evaluation & continued expansion of a national data base on the plastics recycling industry . College of Engrg. The Univ. of Toledo Toledo Ohio.
2. “Characterization of municipal solid waste in the United States: 1990 update.” (1990). EPA/530‐SW‐90‐042 U.S. Envir. Protection Agency Washington D.C.
3. “Characterization of municipal solid waste in the United States; 1992 update.” (1992). EPA/530‐R‐92‐019 U.S. Envir. Protection Agency Washington D.C.
4. Identifying and assessing targets of opportunity for plastics recycling