Encyclopaedia Britannica <br/><br/>
Encyclopaedia Britannica: Year  Books Of  Science And Future 

 - Chicago  William Benton  1977 
 - 447p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Avln
<br/><br/><label>Dewey Class. No.: </label>Avln  / K7