Distance sampling :  estimating abundance of biological populations / 
S.T. Buckland ... [et al.]. 
 - London :  Chapman & Hall,  1993. 
 - xii, 446 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0412426706 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal populations--Statistical methods.<br/>Sampling (Statistics).