Robin F. Ingenthron, Director of Recycling Programs, Division of Solid Waste Management, and Willa S. Kuh, Director, Massachusetts Department of Environmental Protection, Value Added by Recycling Industries in Massachusetts, July 27, 1992

Tellus Institute with Sound Resource Management Group, Inc., More Jobs, Less Pollution: Growing the Recycling Economy in the U.S., c. 2009. 64 pages. Clients: BlueGreen Alliance, Teamsters, Service Employees International Union (SEIU), Natural Resources Defense Council (NRDC), Recycling Works, and Global Alliance for Incinerator Alternatives (GAIA)