The concentration and isotopic abundances of carbon dioxide in rural and marine air

Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide

Harmon Craig · Geochimica et Cosmochimica Acta · 1957 · 4.2K citations

Natural Sciences, Chemistry, Analytical Chemistry +14

Variation of O18 content of waters from natural sources

Samuel Epstein, T. K. Mayeda · Geochimica et Cosmochimica Acta · 1953 · 3.2K citations

Natural Sciences, Oceanography, Chemical Oceanography +4

The thermodynamic properties of isotopic substances

Harold C. Urey · Journal of the Chemical Society (Resumed) · 1947 · 2.5K citations

Natural Sciences, Chemistry, Physics +8

The concentration and isotopic abundances of atmospheric carbon dioxide in rural areas

Charles D. Keeling · Geochimica et Cosmochimica Acta · 1958 · 1.3K citations

Natural Sciences, Earth Sciences, Environmental Sciences +9

Improvements in Mass Spectrometers for the Measurement of Small Differences in Isotope Abundance Ratios

C. R. McKinney, J. M. McCrea, Samuel Epstein et al. · Review of Scientific Instruments · 1950 · 724 citations

Pharmacy, Chemistry, Analytical Chemistry +16