1. Geostandards and agrochemical analysis;Govindaraju;Specrtochimica Acta.,1983
2. A co-operative Investigation of precision and accuracy on chemical, spectrochemical and model analysis of silicate rocks;Falrbalrn;Geological Survey Bulletin,1951
3. A story of two rocks;Ahrens;Geostandards Newsletter,1977
4. Description and analyses of eight new USGS rock standards;USGS Professional Paper,1976
5. Proposal for the organization of a Working Group of standard samples In the framework of the International Association of Geochemistry and Cosmochemistry;Barsukov;Geostandards Newsletter,1983