Lessons Learned, Headquarters, 31st Engineer Battalion Open PDF Document Details Document Type Technical Report Publication Date May 09, 1969 Accession Number AD0856079 Entities Organizations Adjutant General's Corps Tags Communities of Interest Air Platforms Weapons Technologies DTIC Thesaurus Topics Air Force Facilities Aircrafts Army Artillery Civilian Personnel Construction Construction Materials Engineering Engineers Fixed Wing Aircraft Landing Fields Lessons Learned Materials Schools Telephone Lines Training United States