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David has over forty-five years of experience in oil and gas related matters throughout the Rocky Mountain region and has extensive experience in oil and gas conservation and commission matters. Mr. Knowlton was a frequent lecturer at the Institute for Energy Development at the University of Oklahoma. Practice Areas: Natural Resources Education: Greenbrier Military School; University of Denver (B.S.L., 1952); University of Colorado (J.D., 1953) Bar Admissions: Colorado Bar Association | 