Continuous-Tone Electrostatic Electrography Open PDF Document Details Document Type Technical Report Publication Date Dec 15, 1949 Accession Number ADA800084 Entities People D. T. Williams L. E. Walkup R. M. Schaffert Organizations Xerox Tags Communities of Interest Advanced Electronics DTIC Thesaurus Topics Adhesive Tapes Alcohols Cameras Charged Particles Chemistry Colored Smokes Compound Semiconductors Electrical Properties Engineering Films Gray Scale Grids Materials New York Particle Size Photographs Photography