Ray, Walter T. <br/><br/>
Tests of run-of-mine and briquetted coal in a locomotive boiler / 
by Walter T. Ray and Henry Kreisinger. 
 - Washington :  Government Printing Office,  1909. 
 - 32 p. :  ill. ;  23 cm. 
 - United States.  Geological Survey.  Bulletin ;  412 .
<br/><br/>"Survey publications on fuel testing and briquetting" :  p. 31-32. 
<br/><br/><label>LCCN: </label>gs 09000433  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Testing.<br/>Briquets (Fuel)
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 412