. "Olson, Sigurd F."@en . "1899-04-04Z"^^ . "1982Z"^^ . "American conservationist" . . "Sigurd F. Olson"@en . "Sigurd F. Olson (April 4, 1899 \u2013 January 13, 1982) was an American author, environmentalist, and advocate for the protection of wilderness. For more than thirty years, he served as a wilderness guide in the lakes and forests of the Quetico-Superior country of northern Minnesota and northwestern Ontario. He was known honorifically as the Bourgeois \u2014 a term the voyageurs of old used of their trusted leaders."@en . . "1899Z"^^ . . . "1982-01-13Z"^^ .