Steel, Robert G.D <br/><br/>
Principles and procedures of Statistics: a biometrical approach 

 - 2nd ed 
 - AucklaNew Delhi  aMcGraw-Hill  1980 
 - xxi,633p, 22cm 
<br/><br/><label>ISBN: </label>07Y665818 
<br/><br/><label>Dewey Class. No.: </label>519.5,  / D, ste