this is a paperback manual type publication from nato titled " allied command europe tropospheric forward scatter communications system " this is volume 1 covering general description and theory of operation .this is the preliminary edition prepared for shape by the international standard engineering incorporated dated october 1959. this has quite a heavy publication with numerous pullout plans and information ! this scarce publication is in used condition with some cover wear and browning with a previous owners name . i have many more books and items you can view in my ebay shop !