01021cam a2200265   4500001001300000003000400013005001700017008004100034010001700075040004500092050002200137082001800159100004000177245010900217260002300326300003800349490005200387500010100439504002500540650003900565650003300604710003600637710004300673830003900716gs 68000221 DLC20260227111422.0690523s1968    dcuab    b    000 0 eng c  ags 68000221   aU.S. Geological Survey LibrarycDLCdDLC00aQE75b.C5 no. 55200a553/.78/098111 aOltman, Roy E.q(Roy Edwin),d1911-10aReconnaissance investigations of the discharge and water quality of the Amazon River,cby Roy E. Oltman.  aWashington,c1968.  aiii, 16 p.billus., maps.c26 cm.1 aUnited States. Geological Survey. Circularv552  aPrepared in cooperation with the Ministerio da Marinha do Brazil [and the] University of Brazil.  aBibliography: p. 16. 0aStream measurementszAmazon River. 0aWater qualityzAmazon River.1 aBrazil.bMinisterio da Marinha.1 aRio de Janeiro.bUniversidade Federal. 0aGeological Survey circular ;v552.