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Dyfyniad Arddull ChicagoAmerican Chemical Society. Division of Industrial and Engineering Chemistry, W. Novis Smith, and Joseph G. Santangelo. Hydrogen, Production and Marketing. Washington, D.C.: American Chemical Society, 1980.
Dyfyniad MLAAmerican Chemical Society. Division of Industrial and Engineering Chemistry, et al. Hydrogen, Production and Marketing. American Chemical Society, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.