21-cm Absorption of Pulsar Signals
21-cm Emission from the Era of the First Galaxies
21-cm Emission-Absorption Studies of the 30 DOR Region
21-cm emission-absorption studies of the 30 Dor region.
21-cm Hydrogen Observations of the Central Region of the Galaxy.
21-cm line observations of 59 lenticular and spiral galaxies
21-cm line observations of galactic HII regions
21-cm line observations of galaxies from Kazarian's lists
21-cm Line Observations of Galaxies in the Zone of Avoidance
21-cm line observations of the galaxy NGC 1569
21-cm line observations of the group of galaxies NGC 2805, 2814, 2820 and IC 2458
21-cm line profiles of 392 spiral galaxies
21-cm line studies of spiral galaxies. I - Observations of the galaxies NGC 5033, 3198, 5055, 2841, and 7331. II - The distribution and kinematics of neutral hydrogen in spiral galaxies of various morphological types
21-Cm Lunar Occultations of the Galactic Center
21-cm Maser Observations of Galaxies.
21-cm Neutral Hydrogen Observations of Spiral Galaxies in Clusters
21-cm observations in the direction of 43 hot stars and 34 X-ray sources.
21-cm Observations in the Direction of Hot Luminous Stars and X-ray Sources.
21-cm observations in the region of the galactic anti-centre
21-cm observations of a cross section of distant spiral arms