Introduction to mechanical statistics 
Hoel, Paul. 
 - Fourth edition. 
 -  John Wiley and Sons.  1971 
 - 409 pages. 
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<br/><br/><label>ISBN: </label>0-471-40365-2 
<br/><br/><label>Dewey Class. No.: </label>519.4 H67i 1971