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2. Danish EPA. 1997. Ozonlagsnedbrydende stoffer og visse drivhusgasser—1996. Report 98, 1997. Danish EPA, Copenhagen.
3. DKV. 1993. Beitrag der deutschen Kälte-, Klima- und Wärmepumpentechnik zur Verringerung der Treibhausbelastung bis zum Jahre 2005. Statusbericht 13. Stuttgart.
4. Inspectie Milieuhygiene. 1996. Dielissen, LCL and Tijink, E. Actie “Supermarkt.” Report 1996/326. VROM, The Hague.
5. Fire extinguishers;Johnson;Int J LCA,1997