The Madeira river near Porto Velho (RO). There are numerous large rivers in the Amazon region and most of them are navigable. Some rivers during the flooding period may be several miles wide.O Rio Madeira perto de Porto Velho (RO). Há inúmeros rios grandes na Região Amazónica e a maioria deles é navegáveL Alguns rios podem ter várias milhas de largura durante as enchentes.
Latin American and Iberian Institute / University of New Mexico
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