00536nem a2200205 a 450000100080000000500110000800800410001910000200006024500330008026000370011330000370015050000370018765000150022465000160023965000090025565300150026465300220027970000140030170000150031515396672004-10-19       1966    bl uuuu     u0uu1 u    #d1 aTHOFEHRN, H. A.  aEstado do Rio Grande do Sul.  a[Porto Alegre]: IBGE; IGRAc1966  c1 mapa, color. Escala 1:750.000.  a1 mapa, color. Escala 1:750.000.  aDemografia  aHidrografia  aMapa  aMorfologia  aRio Grande do Sul1 aMEYER, L.1 aZAIONS, M.