Candido Rondon found the River of Doubt, now the Rio Roosevelt, which flows in this country's Amazonas State
The expedition, led by Roosevelt and Cndido Rondon, Brazil's most 
famous... [DOC] [TLE] Expedio Centifica Roosevelt-Rondon - Colonel Roosevelt - Erenow [PAR] Expedio Centifica Roosevelt-Rondon - 19141919 - Colonel Roosevelt ... not 
guess any more than that, and had named it Rio da Dvida, the River of Doubt.