by Martin W. Holdgate | .
by Donald C. Weiskopf | .
by E.C. Rhodes | .
by Maurice G. Kendall | .
by Yogendra K. Malik | .
by Jan Gordon | .
by John Gunther | .
by A. Hald | .
by D. Cohen | .
by P.Cappuccinelli | .
by R.H. Groves | .
by Hugo Adolf Bernatzik | .
by Charles S.Elton | .
by Alfred North Whitehead | .
by J. Dupaquier | .
by A. J. Gibbs | H.R.C. Meischke.
by Murray G. Ross | .
by John R.Baker | .
by D. Wilkie | .
by C.S.G. Phillips | .
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