1. The future course of solid waste management in the US;Alter;Waste Management and Research,1991
2. Study of the effectiveness of the Oregon Minimum Deposit Law;Applied Decision Systems,1974
3. Bickerstaffe, J., INCPEN, personal communications with
4. Deposit-Refund Systems;Bohm,1981
5. Dutch Ministry of Housing, Physical planning and environment and Stichting Verpakking en Milieu 1991. Packaging Covenant, the Hague, 6 June