ISBN 184603003X books & textbook
Viet Cong and NVA Tunnels and Fortifications of the Vietnam War (Fortress, 48)
Rottman, Gordon L. Taylor, Chris Ray, Lee Mallinson, Alex
Osprey Publishing /2006-08-29 Paperback / 64 Pages
isbn-10: 184603003X / isbn-13: 9781846030031