. "1990Z"^^ . "Baker, Ronald John"@en . . "Canadian engineer" . "Ronald John Baker"@en . "1990-03-24Z"^^ . . "Ronald John Baker (March 28, 1912 \u2013 March 24, 1990) was a pioneering Canadian engineer."@en . "1912Z"^^ . . "1912-03-28Z"^^ .