U. S. N. Observatory Washington. Observations of Asteroids, made with the Filar-Micrometer by J. Ferguson

U. S. Naval Observatory Eclipse Expedition

U. S. Naval Observatory southern hemisphere expedition

U. S. Naval Observatory, Washington, DC 20392-5420. Report for the period Jul 1995 - Jun 1996.

U. S. Naval Observatory, Washington, DC 20392-5420. Report for the period Jul 1998 - Jun 1999.

U. S. Naval Research Laboratory Report

U. S. Participation in International Space Astrophysics Missions

U. V. Optical Complex Index of Refraction of Interstellar Medium Candidates: Enstatie, Troilite and Bronzite.

U. V. photographic results of the french experiment S 183 on Skylab

U.H.E. γ-ray observations with the EAS-TOP array

U.K. Allocations of EISCAT Observing Time

U.K. Astronomy after World-War

U.K. Nova / Supernova Search Meeting 1983

U.S. and European ALMA Partners Sign Agreement Green Light for World's Most Powerful Radio Observatory

U.S. and U.S.S.R. Academy of Sciences Research Scientist Agreement

U.S. data processing for the IRAS project

U.S. IYA National Efforts: Mining the www.astronomy2009.us Website

U.S. Naval Observatory Double Star CD 2006.5

U.S. Naval Observatory Double Star CD 2006.5

U.S. Naval Observatory Halley watch astrometric catalog