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Assembly via disassembly a case in machine perceptual development

Bajcsy, Ruzena.
Philadelphia, PA : Dept. of Computer and Information Science, School of Engineering and Applied Science, University of Pennsylvania ; [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1989] 1989

Cosmic ray positron research and silicon track detector development final technical report

Jones, W. V.
Washington, D.C. : National Aeronautics and Space Administration, Space Physics Division ; [Springfield, Va. : For sale by the National Technical Information Service, 1990?] 1990