I consulted many books and magazine articles in my research, and I gratefully acknowledge the following works.
1. Apotheker S. Reverse vending: a new market opportunity. Resource Recycling. 1993;October:54–61.
2. Apotheker S. Participation in drop-off recycling programs. Resource Recycling. 1991;January:70–77.
3. Arthur D. Little Inc. A report on advance deposit fees. Cambridge, MA; 1991.
4. Artz NS, Robert Yoos E. Composting potential in municipal solid waste management Prairie Village, Kansas: Franklin Associates, Ltd.; 1990.
5. Baker S. Suddenly, there’s aluminum everywhere. Bus Week. 1993;October(25):46.
6. Beaty EW. Litter got you stumped? Try clean community systems approach University of Tennessee: MTAS Publications, Tennessee ...