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Washing and coking tests of coal at the fuel-testing plant,.. 

United States congressional serial set ; serial set no. 5460;House document / 60th Congress, 2nd session. House ; no. 1060
Belden, A.W. ; Delamater, George Richardson ; Groves, J.R. , 1909
Link: http://docs.newsbank.com/select/serialset/117BD88C4835..