Fisher, N. I. <br/><br/>
Statistical analysis of circular data / 
N. I. Fisher. 
 - Cambridge :  Cambridge University Press,  1993. 
 - xviii, 277 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521568900 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical statistics.<br/>Circular data.