FOUR-DIMENSIONAL DESCRIPTIVE GEOMETRY REGULAR PENTATOPE - ORTHOGRAPHIC PROJECTIONS Open PDF Document Details Document Type Technical Report Publication Date Mar 01, 1965 Accession Number AD0631307 Entities People C. S. Lindgren Organizations U.S. Steel Tags Communities of Interest Air Platforms DTIC Thesaurus Topics Engineering Engineering Drawings Engineers Four Dimensional Geometry Graphics Three Dimensional Triangles United States Universities