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 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 Halley watch astrometric catalog

U.S. Naval Observatory parallaxes of faint stars - List VII

U.S. Naval Observatory parallaxes of faint stars - List VIII

U.S. Naval Observatory parallaxes of faint stars. VI

U.S. Naval Observatory photographic parallaxes - List IX

U.S. Naval Observatory Report

U.S. Naval Observatory, Washington, D.C. (1 July 1973 - 30 June 1974). Observatory report.

U.S. Naval Observatory, Washington, D.C. 20390. Report for the period 1 July 1977 - 30 June 1978.

U.S. Naval Observatory, Washington, D.C. 20390. Report for the period 1 July 1979 through 30 June 1980.

U.S. Naval Observatory, Washington, D.C. 20390. Report for the period 1 July 1980 - 30 June 1981.

U.S. Naval Observatory, Washington, D.C. Observatory report covering the period 1 July 1975 - 30 June 1976.

U.S. Naval Observatory, Washington, D.C. Observatory report for 1 July 1972 - 30 June 1973.

U.S. Naval Observatory, Washington, D.C. Observatory report for the period 1 July 1974 - 30 June 1975.