18O/16O ratios in cherts associated with the saline lake deposite of East Africa

18O/16O ratios in sulfate from fossil shells

18O/16O ratios in sulfate from living marine organisms

18O/16O, 30Si/28Si, D/H, and 13C/12C Studies of Lunar Rocks and Minerals

18O13C16O in Earth’s atmosphere

18th International Cosmic Ray Conference held at Bangalore, India, August 22 - September 3, 1983.

18th International meeting on Organic geochemistry

18th International Meeting on Organic Geochemistry

19 20 May 1969, an example of type III emission during the impulsive phase of flares

19 Fortuna CCD Spectrum

19 GHz (1.58 cm) Solar Radio Bursts in the Period July 1967 to December 1969

19 Leporis

19 Leporis

19 New Variable Stars Near the South Pole.

19 times of minima and first ephemeris for the EB star RRVI-51.

19 times of minima and first ephemeris for the EB star RRVI-51. Revised edition.

19-F NMR Investigation of Iron-pnictide Superconductor LaFeAsO(0.89)F(0.11)

190 Ismene CCD Spectrum

1900 April 11 meeting of the Royal Astronomical Society

1900 April 25 meeting of the British Astronomical Association