| nswma.org | National Solid Wastes Management Association (NSWMA) |
| envasns.org | Environmental Industry Interactive (EII) |
| iswa.org | International Solid Waste Management Association (ISWA) |
| isri.org | Institute of Scrap Recycling Industries |
| hmac.org | Hazardous Materials Advisory Council |
| costha.com | Conference on Transportation of Hazardous Articles (COSTHA) |
| ciwm.co.uk | Chartered Institution of Wastes Management |
| astswmo.org | Association of State and Territorial Solid Waste Management Officials (ASTSWMO) |
| asiwpca.org | Association of State and Interstate Water Pollution Control Administrators (ASIW |
| tu-berlin.de | Argus |
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