Search Results for the EPA National Library Catalog

Items Found: 4
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Your Search: (AUTHOR=Hawley AND John AND R)


 
 
 
Select Item Title Year Published
Mine waste control in Ontario / 0
Sediment transport in the western tributaries of the Sacramento River, California / 1972
Sources of metals and metal levels in municipal wastewaters / 1978
The problem of acid mine drainage in the province of Ontario, 1972

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