U 1915-05

U and Th content in the Central Apennines continental crust: a contribution to the determination of the geo-neutrinos flux at LNGS

U Antliae --- A Dying Carbon Star

U Aquarii

U Aquarii

U Aquarii

U Aquarii

U Aquarii

U Aquarii

U Aquarii

U B V Colors of RR Lyrae Stars in Globular Clusters

U B V Photometry of SCO XR-1

U B V R I Photometry of Stellar Structures throughout the Disk of the Barred Galaxy NGC 3367

U Cephei - A mass-transfer event. I

U Cephei - Effects of disk, hot spot, and stream on primary eclipse light curves

U Cephei a Mass-Transfer Event. II. Observations

U Cephei and its outbursts in 1969 and 1974

U Cephei: an anomalous spectrographic result.

U Coronae borealis

U Del & EU Del light curve comments : response.