by Peter Deadman | .
by John Harris | .
by Howard E. Sypher | .
by Morris R. Cohen | .
by Thomas M.Achenbach | .
by Michael E.Roloff | .
by Henri Bergson | .
by Paul F. Wilkinson | .
by S.Chandrasekhar.
by R. F. Dillon | .
by A. Bennett | S. Hausfeld R.A. Reeve.
by Helen N. Lunt | .
by Stuart Throne | .
by Robert Hopper | .
by Robert D.Mcphee | .
by Frederick Hartwig | .
by Margaret Lusty | .
by Gordon W.Duncan | .
by Andre Beteille | .
by J. Robinson | .
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