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Received <br /> IA-72 Project Period AN 2 7 1996 <br /> N departure of zinc concentration Durango Field Office <br /> Division of Minerals&Geology <br /> 4 <br /> I <br /> 3 <br /> 2fD <br /> - <br /> � i <br /> � I <br /> 1 <br /> N <br /> CU <br /> o -�-=-- <br /> Z -1 � <br /> F <br /> -2 <br /> i <br /> -3 ------------1- -1-------L ---------1---------------------L------------L------------L---------L------ ---------—L---------�----! <br /> 1 2 3 4 5 6 7 8 9 10 11 12 <br /> Period <br />