Lessons Learned, Headquarters, 809th Engineer Battalion (Construction) Open PDF Document Details Document Type Technical Report Publication Date May 04, 1970 Accession Number AD0875747 Entities Organizations Adjutant General's Corps Tags Communities of Interest Biomedical Human Systems DTIC Thesaurus Topics Addiction Artillery Civic Action Civil Affairs Concrete Construction Construction Equipment Drug Abuse Dump Trucks Engineers Lessons Learned Maintenance Materials Reinforced Concrete Sheet Metal Training United States