U, B and r band luminosity functions of galaxies in the Coma cluster
U, B, V light curves of CO Lacertae
U, B, V surface photometry of the galaxy Markaryan 190
U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars.
U, b, v, Observations of U SGR.
U, Np, Pu & Am Prompt Fission Neutron Spectra
U-band study of the accretion properties in the sigma Ori star-forming region
U-shaped outflow in the LYNDS 1221 dark cloud - an example of interaction of outflows with ambient molecular clouds
U. Leonhardt and P. Piwnicki reply to the ``Comment on `Relativistic Effects of Light in Moving Media with Extremely Low Group Velocity ' '' by M. Visser
U.S. and European ALMA Partners Sign Agreement Green Light for World's Most Powerful Radio Observatory
U.S. Naval Observatory Double Star CD 2006.5
U.S. Naval Observatory Double Star CD 2006.5
U.S.-Canadian Partnership in Radio Astronomy Valuable for Science, NRAO Director Says
U.S.-U.S.S.R. space cooperation
U1(prime) dark matter and R-parity violation
UBC-NASA Multi-Narrowband Survey. I. Description and Photometric Properties of the Survey
Ubc/Laval 2.7-Meter Liquid Mirror Telescope
Über Bildung und Vernichtung der Zirkulationsbewegungen einer Flüssigkeit. Mit 17 Textfiguren
Uber das Gravitationsfeld eines Massenpunktes nach der Einstenschen Theorie
Über Den Aufbau Der Stern- Und Galaxienhaufen