Snead, Peter H A . <br/><br/>
Numerical taxonomy : the principles and practice of numerical classification 
Peter H.A. Snead and Robert R. Sokal 
 - San Francisco  W.H. Freeman  c1973 
 - xv, 573p.;  25cm. 
<br/><br/><label>Dewey Class. No.: </label>574.012  / SNE