Schreider, Helen. <br/><br/>
Exploring the Amazon / 
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 .
<br/><br/>Bibliography: p. 205. 
<br/><br/><label>ISBN: </label>0870440780 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Amazon River.