1. Petrography of bauxite surrouding cores of kaolinized nepheline syenite in Arkansas;GOLDMAN M. I.;Economic Geology,1955
2. Estudo estatístico dos minerais pesados da formação Botucatu;GOÑI J. C.,1961
3. The use of heavy minerals in studies of the origin and development of soils;HASEMAN J. F.;Research Bulletin,1945
4. Mineralogical and chemical studies of soil formation from acid and basic rocks in Missouri;HUMBERT R. F.;Research Bulletin,1943
5. Manual of sedimentary petro-graphy;KRUMBEIN W. C.,1938