. "1982-01-31Z"^^ . . . . "1906-07-01Z"^^ . "1982Z"^^ . "Peter Ritchie Calder, Baron Ritchie-Calder (1 July 1906, Forfar, Angus \u2013 31 January 1982, Edinburgh) was a Scottish socialist author, journalist and academic."@en . . . . "1906Z"^^ . "Calder, Peter Ritchie"@en . . "British journalist and academic" . . "Peter Ritchie Calder"@en .