Ibon facts and figures/ 

 - xi,12+ pages:  illustrations;  27 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9711020297 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>315.914