15 keV - 1 MeV Observations of NGC 4151 and NGC 5128 by HEAO A-4

15 Micron Infrared Space Observatory Observations of the 1415+52 Canada-France Redshift Survey Field: The Cosmic Star Formation Rate as Derived from Deep Ultraviolet, Optical, Mid-Infrared, and Radio Photometry

15 MPC Structure at 2.1 < Z < 3.3 from the Lyalpha Forest

15 new variable stars in Harvard Maps Nos. 31 and 62

15 new variable stars in Harvard Maps, Nos. 15, 18 and 27

15 pixels digital autocorrelation spectrometer system

15 years of comet photometry: A comparative analysis of 80 comets

15 years of high precision astrometry in the Galactic Center

15-GHz flux density of V

15-GHz observations of the quasars 3C 270.1 and 3C 275.1

15-GHz variability of 9C sources

15-in. refractor for Konigsberg

15-m laser-stabilized imaging interferometer

15-year Sky Background Trends at CTIO

15.5-GHz flux-density measurements of variable radio sources

150 GHz NOBA Observations of the Galactic Center Arc

150 GHz observations of three radio galaxies

150 Jahre Hugo von Seeliger (1849 - 1924).

150 keV Emission from PKS2149-306 with BeppoSAX: A Compton Suppressed Jet and the Origin of Radio-quiet Quasars

150 Magnitudes of Visual Extinction Towards the Central Region of the Barred Galaxy NGC 3367