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1. Drinking water resources : a collection of drinking water reference documents & materials
   EP 1.104:W 29/CD
2. Information collection rule water utility database system
   EP 1.104:W 29/FLOPPY
3. Information collection rule water utility database system
   EP 1.104:W 29/FLOPPY/REL.1.1
4. Water supply guidance manual
   EP 1.104:W 29/2/CD