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Dyfyniad Arddull ChicagoGurtu, J N., and R Rana Kapoor. I I T. Chemistry: For All Engineering Competetive Examination. New Delhi: S. Chand, 1991.
Dyfyniad MLAGurtu, J N., and R Rana Kapoor. I I T. Chemistry: For All Engineering Competetive Examination. S. Chand, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.