Boobytraps FM 5-31,Boobytraps Field Manual 5-31: U.S. Department of the Army: 9781492945369: Amazon.com: Books,BOOBYTRAPS Department Of The Army Field Manual FM 5-31 Book September 1965,BOOK REVIEW: FM 5-31 BOOBYTRAPS. DEPARTMENT OF THE ARMY FIELD MANUAL SEPTEMBER 1965,Boobytraps FM 5-31: Pentagon U.S. Military: 9780975900932: Amazon.com: Books