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Dyfyniad Arddull ChicagoSHARMA S. ANS- DEF. SUMBOLS FORMULAS AND TABLES FOR CONTROL CHARTS. MEERUT: KEDAR NATH PUB, 1984.
Dyfyniad MLASHARMA S. ANS- DEF. SUMBOLS FORMULAS AND TABLES FOR CONTROL CHARTS. KEDAR NATH PUB, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.