Keywords: O-1A VNAF 23TW 112LS BienHoa 1971.jpg A Cessna O-1A observation aircraft of the 112th Liaison Squadron 23rd Tactical Wing of the South Vietnamese Air Force at Bien Hoa Air Base 1971 en wikipedia ; Source The Vietnamese Air Force 1951-1975 An Analysis of Its Role in Combat by William W Momyer Gen USAF Ret USAF Southeast Asia Monograph Series Washington Department of the Air Force 1979 1971 PD-USGov original upload log page en wikipedia Vno-1-23tw-112ls--bh-1971 jpg 2006-06-29 12 21 Bwmoll3 600×405×8 55203 bytes <nowiki>O-1 observation aircraft of the 112th Liaison Squadron / 23rd Tactical Wing - South Vietnamese Air Force - Bien Hoa Air Base - 1971 Source The Vietnamese Air Force 1951-1975 An Analysis of Its Role in Combat by William W Momyer Gen USAF Ret USAF</nowiki> Cessna L-19 Bird Dog Air force of South Vietnam VNAF Bien Hoa Air Base Cessna O-1 Bird Dogs during the Vietnam War Vietnam War in 1971 |