Isotopes.

Handbook of environmental isotope geochemistry Author not listed 1980 Isotope effects on reaction rates Melander, Lars C. S. 1960 Isotopes Aston, F. W. 1924 Isotopes and their application in the field of industrial materials Aebersold, Paul C. 1948 Isotopes in the atomic age Arnikar, Hari Jeevan 1989 Nuclear engergy in industry Crowther, J.G. 1956 Progress in isotope geology Rankama, Kalervo 1963