Neutral 14N in the interstellar medium

Radio Observations of OH in the Interstellar Medium

S. Weinreb, Alan Barrett, John C. Henry · Nature · 1963 · 368 citations

A High Resolution Investigation of 21 cm Absorption Spectra

W. L. H. Shuter, Gerrit L. Verschuur · Monthly Notices of the Royal Astronomical Society · 1964 · 33 citations · Full text

Engineering, Absorption Spectroscopy, Optical Properties +18

Astrometry and astrophysics

V. I. Voroshilov · 1974 · 13 citations

Astronomical Coordinate System, Photometry, Astronomical Image Analysis +2