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		No cover image available Proceedings / Nautical Almanac Office Sesquicentennial Symposium, U.S. Naval Observatory, March 3-4, 1999 ; edited by Alan D. Fiala and Steven J. Dick. by United States Naval Observatory. Nautical Almanac Office. Sesquicentennial Symposium (1999 : Washington, D.C.) Fiala, Alan D Dick, Steven J Washington, D.C. : U.S. Naval Observatory, 1999 Other title: Nautical Almanac Office Sesquicentennial Symposium Availability: Items available for loan: NCAR Library (1)Call number: QB807 .U54 1999. Place hold
		No cover image available Towards models and constants for sub-microarcsecond astrometry : proceedings of IAU Colloquium 180 : held at the U.S. Naval Observatory, Washington, DC, USA, 27-30 March 2000 / edited by Kenneth J. Johnston ... [et al.]. by International Astronomical Union. Colloquium (180th : 2000 : Washington, D.C.) Johnston, Kenneth J, 1941- Washington, DC : U.S. Naval Observatory, 2000 Other title: Proceedings of IAU colloquium 180 Availability: Items available for loan: NCAR Library (1)Call number: QB807 .I58 2000. Place hold

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