Filtering by: Contributor Halliburton, J.C. Remove constraint Contributor: Halliburton, J.C. Contributor Padgett, Barry C. Remove constraint Contributor: Padgett, Barry C. Contributor Roebuck, Henry D. Remove constraint Contributor: Roebuck, Henry D. Contributor Spencer, William C. Remove constraint Contributor: Spencer, William C. Year Created 1969 Remove constraint Year Created: 1969