Lessons Learned, Headquarters, 31st Engineer Battalion (C) (A) Open PDF Document Details Document Type Technical Report Publication Date May 09, 1970 Accession Number AD0873367 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Air Force Facilities Army Classified Materials Combat Support Concrete Construction Conveyors Engineers Landing Fields Lessons Learned Physical Security Quality Control Reinforced Concrete Schools Security Soil Stabilization United States