Subviral pathogens of plants and animals :  viroids and prions / 
edited by Karl Maramorosch, John J. McKelvey, Jr. 
 - Orlando, Fla. :  Academic Press,  1985. 
 - (550 pages) :  illustrations ;  24 cm. 
<br/><br/> 'Proceedings of a symposium ... sponsored by the Rockefeller Foundation, held in Bellagio, Italy, June 27-July 2, 1983.' 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Viroids--Congresses.