00441nam a2200145Ia 4500008004100000010001200041040001700053082002500070100002100095245005000116260004100166300001400207650005600221700001800277190327s9999||||xx |||||||||||||| ||und||  a59-7486  aNITILcNITIL  221sta622.338bM478O  aMcCray, Arthur W 0aOil well drilling technologycArthur W McCray  aNormanbUniversity of Oklahomac1959  axi, 492p.  aOil well drilling; Petrolium; Electric power-Plants  aCole, Frank W