G.B. Wetherill (G. B. Wetherill / Wetherill, G.B. / Wetherill, G. B.)

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  Elementary Statistical Methods
  by G. B. Wetherill
  Softcover, Wiley & Sons, Incorporated, John, ISBN 0470937114 (0-470-93711-4)
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  Frontiers in Statistical Quality Control 4
  by G.B. Wetherill, H.J. Lenz, P.T. Wilrich
  Softcover, Springer Verlag, ISBN 038791434X (0-387-91434-X)
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  Frontiers in Statistical Quality Control, 3
  by H.J. Lenz, G.B. Wetherill, P.T. Wilrich
  Softcover, Springer Verlag, ISBN 0387913157 (0-387-91315-7)
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  Sequential Methods in Statistics
  by G. Barrie Wetherill
  Hardcover, Chapman and Hall, ISBN 0470937092 (0-470-93709-2)