Cowan, G.A., and Adler, H.H., 1976, The variability of the natural abundance of 235U: Geochimica et Cosmochimica Acta, v. 40, no. 12, p. 1487-1490.
Cowan, G.A., and Adler, H.H.
Geochimica et Cosmochimica Acta, v. 40, no. 12, p. 1487-1490.
Uranium, Isotope Geochemistry, Geochemical Survey, Petrified Forest Mbr - Chinle Fm - Triassic,
