1. Hillebrand WF (1900) Some principles and methods of rock analysis. United States Geol Surv Bull 176:114
2. Clarke FW, Hillebrand WF (1897) Analyses of rocks, with a chapter on analytical methods, laboratory of the United States Geological survey 1880 to 1896. United States Geol Surv Bull 148:306
3. Washington HS (1903) Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses. US Geol Surv Prof Pap 14:495
4. Hillebrand WF (1907) The analysis of silicate and carbonate rocks. United States Geol Surv Bull 305
5. Hillebrand WF (1910) The analysis of silicate and carbonate rocks. United States Geol Surv Bull 422