MIL-S-464F (AMENDMENT 2), MILITARY SPECIFICATION: SPREADER, AGGREGATE, TOWED-TYPE TRACTION-POWERED (01 MAY 1987)., This amendment forms a part of MIL-S-464F(ME), dated l7 July 1985, and isapproved for use within the USA Belvoir Research, Development, andEngineering Centers Department of the Army and is available for use by allDepartments and Agencies of the Department of Defense.