Original issue, US Army Technical Manual, 103 pages, size is 8 1/4" x 10 3/4", stapled, three hole punched, dated 28 April 1978.  This is not a commercial copy or print but an original issue government publication issued in 1978 and republished in 1987 to include changes 1 and 2..  This publication is titled - TM 11-5840-347-13, Operator, Organizational and DS Maintenance for Radar Set AN/PPS-15A(V)1.  Publication is designed to provide information and instructions for the operation of the PPS15 and also includes all repair and maintenance requirements and procedures.  Very well illustrated using photographs and clear and detailed line drawings.