TY - RPRT TI - Conceptual design considerations for the Astrometric Telescope Facility AU - Dyer, John W. AU - Nishioka, K. AU - Sobeck, Charles K. AU - Gatewood, George D. AU - Levy, Eugene H. PY - 1991 UR - https://ntrs.nasa.gov/citations/19910060646 ID - 19910060646 ER -