)١٥( انظر United States Congress, Office of Technology Assessment, Green Products by Design - Choices for a Cleaner Environment, OTA-E-541 (Washington, D.C., United States Government Printing Office, October 1992).
51/ См. United States Congress, Office of Technology Assessment, Green Products by Design - Choices for a Cleaner Environment, OTA-E-541 (Washington, D.C., United States Government Printing Office, October 1992.)