. . "Freund, Peter"@en . . . "1936-09-07Z"^^ . . . "Peter George Oliver Freund (born 7 September 1936) is a professor emeritus of theoretical physics at the University of Chicago. He has made important contributions to particle physics and string theory. He is also active as a writer."@en . . . "Peter G.O. Freund"@en . . "1936Z"^^ . "American physicist" . . .