by T.N. Ananthakrishaan | .
by G.S. Puri | .
by George Simpson | Fritz Kelfa.
by George W. Snedecor | William G. Cochran.
by John H. Mueller | Karl F. Schuesseler.
by Walter T. Federer | .
by Damaraju Raghaba Rao | .
by | .
by J.T. Panikar | .
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