[1]
A. C. A. Pinto and T. F. A. . Maia, “Characterization of secondary deposits of columbite-tantalite minerals found in the city of Rorainópolis (RR), Brazil”, Int J Innov Educ Res, vol. 8, no. 4, pp. 450–468, Apr. 2020, doi: 10.31686/ijier.vol8.iss4.2299.