BUCKLAND, S T. <br/><br/>
Distance Sampling : Estimating Abundance of Biological Populations. 

 - London.  Chapman & Hall.  1993 
 - xii, 446p. 
<br/><br/><label>ISBN: </label>0 412 42660 9 
<br/><br/><label>Dewey Class. No.: </label>591.5'248