Lessons Learned, Headquarters, 809th Engineer Battalion (Construction) Open PDF Document Details Document Type Technical Report Publication Date Feb 09, 1970 Accession Number AD0868323 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Air Force Air Force Facilities Air Force Personnel Aircrafts Artillery Civil Engineering Concrete Construction Construction Equipment Contracts Dump Trucks Engineers Helicopters Lessons Learned Materials Schools Training