Subviral pathogens of plants and animals : viroids and prions / edited by Karl Maramorosch, John J. McKelvey, Jr. Prions. Maramorosch, Karl. McKelvey, John J. Rockefeller Foundation. Viroids Congresses. Prions Congresses. QR500 .S83 1985 576.6 19 MAS Proceedings of a symposium sponsored by the Rockefeller Foundation, held in Bellagio, Italy, June 27-July 2, 1983. Includes bibliographies and index. Orlando, Fl. : Academic Press, c1985. c1985. 1985 Text xiv, 549 p. : eng