July 29 (Reuters) - Canadian National Railway CNR.TO
* Canadian National Railway Co says purchases will form part of normal course issuer bid for up to 33 million shares announced on Oct. 27, 2015
* Will enter into three share repurchase agreements with third parties to repurchase common shares through daily purchases
* CN to purchase its common shares under specific share repurchase programs Source text for Eikon: ID:nCNWTWvJDa Further company coverage: CNR.TO
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