@article{28624, author = "XVIII Brazilian Congress of Cartography, 3 - 9 September 1997, Riocentro, Rio de Janeiro, Brazil", title = "Scientific assembly of the International Association of Geodesy (IAG 97) in conjuction with XVIII brazilian Congress of Cartography : 3 - 9 September 1997, Riocentro, Rio de Janeiro, Brazil : Book of abstracts ", year = "1997", note = "Soc. Brasil. Cartogr., IAG., 1 sv.", }