SNEATH, Peter H.A., SOKAL, Robert R. <br/><br/>
Numerical taxonomy : the principles and practice of numerical classification 

 -  San Francisco : W.H. Freeman  1973 
 - 573 p. 
<br/><br/><label>ISBN: </label>0000716706970 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Taxonomy : Biology : Clascification
<br/><br/><label>Dewey Class. No.: </label>057.06  / S52