Machado, W., Campos, R.A. and Stipp, N.A.F. 2005. Consideration about a conservacionist study about the micro basins hydrographics of the rivers Dosapertados and Três Bocas, north of Paraná - Brazil. Sociedade & Natureza. 1, 1 (May 2005). DOI:https://doi.org/10.14393/SN-v1-2005-9715.