1. Roche étalon GR—granite calco-alcalin;Centre De Recherches Petrographiques Et Geochimiques,1961
2. A co-operative investigation of precision and accuracy in chemical, spectrochemical and modal analysis of silicate rocks;Fairbairn;U.S. Geol. Surv. Bull. 980,1951
3. U.S. Geological Survey silicate rock standards;Flanagan;Geochim. Cosmochim. Acta,1967
4. Sources of geochemical standards;Flanagan;Geochim. Cosmochim. Acta,1967
5. Silicate Analysis;Groves,1951