De natura deorum ; Academica / Cicero ; with an English translation by H. Rackham. - Cicero, Marcus Tullius, 106-43 a.C. (OLS)http://pul/name/553; Cicero, Marcus Tullius, 106-43 a.C. Academica (Cicero, Marcus Tullius, 106-43 a.C.) Inglese e latino. (OLS)http://pul/name/19504; Rackham, H. (Harris), 1868-1944. (OLS)http://pul/name/19503 (W. Heinemann, 1933)
At head of title: Cicero.
Latin and English on opposite pages.