MIL-T-5021D (AMENDMENT-1), MILITARY SPECIFICATION: TEST, AIRCRAFT AND MISSILE WELDING OPERATORS QUALIFICATION (07-MAR-1975) [S/S BY MIL-STD-1595]
MIL-T-5021D (AMENDMENT-1), MILITARY SPECIFICATION: TEST, AIRCRAFT AND MISSILE WELDING OPERATORS QUALIFICATION (07-MAR-1975) [S/S BY MIL-STD-1595].