. . . . . "1933-11-17"^^ . "1933"^^ . . . . . . "William Walter Siebens"@en . . . . . "William Walter Siebens"@en . . . . . . . . . "52596929"^^ . . . . . . "2020-06-29"^^ . . . "William Walter \"Bill\" Siebens (17 November 1933 \u2013 29 June 2020) was an American-Canadian oilman. He is best known as the founder and president of , a company that operated from 1965 until its sale in 1978."@en . . . . . . . . . . "Bill Siebens"@en . . . . . . "5000"^^ . . . . . . . . . . . . . . . "2020"^^ . . . . "1933-11-17"^^ . . . . "2020-06-29"^^ . . "William Walter \"Bill\" Siebens (17 November 1933 \u2013 29 June 2020) was an American-Canadian oilman. He is best known as the founder and president of , a company that operated from 1965 until its sale in 1978."@en . . "1102185572"^^ . .