Lessons Learned, Headquarters, 168th Engineer Battalion Open PDF Document Details Document Type Technical Report Publication Date Nov 07, 1969 Accession Number AD0864406 Entities Organizations Adjutant General's Corps Tags Communities of Interest Biomedical Energy and Power Technologies Human Systems Weapons Technologies DTIC Thesaurus Topics Abstracts Aerial Reconnaissance Aircrafts Army Artillery Combat Support Concrete Construction Construction Materials Directives Drinking Water Engineers Helicopters Lessons Learned Materials United States Warfare