Petrarca, Francesco, Petrarch's Bucolicum carmen translated and annotated by Thomas G. Bergin ; with ill. by Deane Keller. - New Haven Yale University Press 1974. - xvii, 252 p. ill. 23 cm. English and Latin. Includes bibliographical references. ISBN: 0300017243 LCCN: 73094049 //r83 LC Class. No.: PQ4496.E29 / B83 1974 Dewey Class. No.: 851/.1