Publication Information

Maps
1982-01-01 
M-13 
Hydrologic Unit Map - 1981, State of Iowa, prepared in cooperation with the U.S. Water Resources Council, published by the U.S. Geological Survey, 1982, as Hydrologic Unit Map - 1981, scale - 1:500,000. 
116 
 
$2.50 
$1.50 

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