1. Reverse Logistic Systems - A Comparative Study;Nagel
2. B. Krummenacher P. Peuch M. Fisher M. Biddle Automatic Identification and Sorting of Plastics from Different Waste Streams - A Status Report 1998
3. Plastics Recovery in the USA;Fisher
4. The Outline of Separation Technology of Plastics Waste Developed and Practiced in Japan;Miyake
5. European Community Policy;Flowers