Operator's, Organizational, Direct Support, and General Support Maintenance Manual for Power Supply, Hydraulic/electric, Portable: (4933-933-4742) Used with M5, M18(XM18), M18A1(XM18E1), M21, XM27E1, M28(XM28), M28A1(XM28E1), M35(XM35), and XM156 Aircraft Armament Subsystems
jan 1990. · Headquarters, Department of the Army