ebrary, Inc, & American Water Works Association. (2002). Simplified procedures for water examination (5th ed.). American Water Works Association.
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Dyfyniad Arddull Chicago
ebrary, Inc, and American Water Works Association. Simplified Procedures for Water Examination. 5th ed. Denver, CO: American Water Works Association, 2002.
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Dyfyniad MLA
ebrary, Inc, and American Water Works Association. Simplified Procedures for Water Examination. 5th ed. American Water Works Association, 2002.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.