Hall, J. R., & Glysson, G. D. (1991). Monitoring water in the 1990's: Meeting new challenges. ASTM.
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Dyfyniad Arddull Chicago
Hall, Jack R., and G. Douglas Glysson. Monitoring Water in the 1990's: Meeting New Challenges. Philadelphia, PA: ASTM, 1991.
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Dyfyniad MLA
Hall, Jack R., and G. Douglas Glysson. Monitoring Water in the 1990's: Meeting New Challenges. ASTM, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.