RT Journal Article SR Electronic(1) A1 De L.S. Gouvea, M.YR 1993 T1 DGPS, Histórico da Implantaçăo do Primeiro Sistema Brasileiro JF , VO OP SP cp-324-00119 DO https://doi.org/10.3997/2214-4609-pdb.324.621 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609-pdb.324.621