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2. Review of Brazilian investigations in areas of high natural radioactivity. Part I: Radiometric and dosimetric studies;Cullen,1977
3. Naturally occurring radionuclides in the monazite sands of Guarapari and Meiaipe (Brazil);Malanca,1994
4. Radionuclide content of building materials and gamma ray dose rates in dwellings of Rio Grande do Norte, Brazil;Malanca;Radiat. Prot. Dosim.,1993
5. Assessment of the natural radioactivity in the Brazilian state of Rio Grande do Norte;Malanca;Hlth Phys,1993