Schreider, Helen. Exploring the Amazon, [electronic resource] / by Helen and Frank Schreider. With photos. by the authors. Foreword by Gilbert M. Grosvenor. Produced by the Special Publications Division, National Geographic Society.. — Washington, D.C. : [National Geographic Society,, 1970]. — 207 p. : col. illus., col. maps, col. ports. 27 cm. — (National geographic special publications).
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Amazon River. Amazon River Valley. Amazone (Fleuve)