1. chinafreon.com ---- 6/29/02
2. cbg.org.cn ---- 6/29/02
3. cei.gov.cn ---- 6/29/02
4. chinahvacr.com ---- 6/29/02
5. cncold.com ---- 6/29/02
6. chinarhvac.com ---- 6/29/02
7. William Wurzbach Company (a refrigerant dealer in Northern CA) ---- 6/27/02
8. Dupont's China website ---- 6/27/02
9. Allied Refrigeration Inc. ---- 6/26/02
10. International Institute of Refrigeration ---- 6/25/02
11. National Association of Plumbing-Heating-Cooling Contractors ---- 6/25/02
12. Refrigeration Service Engineers Society ---- 6/25/02
13. Lenz distributor ---- 6/1/02
14. puron ---- 6/1/02
15. Northamerican Heating, Refrigeration & Airconditioning Wholesalers Association ---- 6/1/02
16. Air-Conditioning & Refrigeration Wholesalers International ---- 6/1/02
17. Air-Conditioning Contractor Association ---- 6/1/02
18. Air-Conditioning and Refrigiration Institute ---- 6/1/02
19. ASHRAE ---- 11/14/01
20. refrigerantsales.com ---- 11/12/01
21. EPA test homepage---- 11/12/01
22. ARTI database homepage ---- 11/12/01
23. Rhodia Ltd.---- 11/8/01
24. Atofina Chemicals ---- 11/8/01
25. People's Welding Supply ---- 11/8/01
26. Refron ---- a refrigerant distributor ---- 11/8/01
27. Genetron (part of AlliedSignal and Honeywell)---- 11/8/01
28. Underwriters Laboratories ---- 11/5/01
29. dupont suva homepage---- 11/5/01
30. Asia Environmental Review ---- 11/1/01
31. EPA ---- 10/31/01
32. EPA/ozone ---- 10/31/01
33. AFEAS ---- 10/31/01