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Dyfyniad Arddull ChicagoRittmann, Bruce E. Environmental Biotechnology: Principles and Applications. McGraw-Hill, 2001.
Dyfyniad MLARittmann, Bruce E. Environmental Biotechnology: Principles and Applications. McGraw-Hill, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.