01704nam a2200337 k 4500001001500000005001500015008004100030034005600071035002000127040001300147049002100160052002200181086002100203110004500224245028900269255007500558260007400633300002300707490002100730500004700751500001900798500009200817500004500909650005000954650006201004651003701066700003601103830006001139900002201199963014501221WMF000105657  20201125101543840303s1983    us ag     a     1   eng  1 aab250000/dW1343000.eW1315000fN0571000gN0560000  a(OCoLC)10482259  aGPOcGPO0 lAV0000067906fXA06aI 19.76b83-420-J  aI 19.76:83-420-J  aGeological Survey (미국)0KAB20201035510aDistribution and abundance of determinable silver by spectrographic analysis in nonmagnetic fraction of heavy-mineral concentrates from stream sediments and in the minus-80-mesh fraction of stream sediments, Petersburg area southeast Alaskah[microform]/dJohn B. Cathrall... [et al.]  aScale 1:250,000c(W 134p0s30?-W 131p0s50?N 57p0s10?-N 56p0s00?  a[Reston, Va.?]:bU.S. Dept. of the Interior, Geological Survey,c1983  a1 map;c53 x 70 cm00aOpen file report  aRelief shown by contours and spot heights.  a"Preliminary."  aMicrofiche. [Denver, Colo. : U.S. Geological Survey, 1983?]. 1 microfiche ; 11 x 15 cm.  aIncludes "Location index map" and table. 0aSilver oreszAlaskazPetersburg RegionxMaps. 0aGeochemical prospectingzAlaskazPetersburg RegionxMaps. 0aAlaskazPetersburg RegionxMaps.1 aCathrall, John B.0KAC2020J0573 0aOpen-file report (Geological Survey (U.S.));v83-420-J.10a캐스럴, 존 B.  aSilveraoresaGeochemicalaprospectingaMapsaMapsaAlaskaaPetersburgaRegionaAlaskaaPetersburgaRegionaAlaskaaMapsaPetersburgaRegion