William Walter "Bill" Siebens (17 November 1933 – 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.
William Walter "Bill" Siebens (17 November 1933 – 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)
William Walter "Bill" Siebens (17 November 1933 – 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)