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J. M. Roberts
Penelope J. E. Davies
Alan and John Roberts Raven
R. W. und E B. Roberts Cordier

See also:

Penelope J.E. Davies, Walter B. Denny, Frima Fox Hofrichter, Joseph F. Jacobs, Ann M. Roberts, David L. Simon
Davies, Penelope J. E./ Denny, Walter B./ Hofrichter, Frima Fox/ Jacobs, Joseph F./ Roberts, Ann M.