To locate primary sources using OneSearch, I recommend you begin at the Advanced Search screen.
To locate a specific ancient author or text, search by Author/Creator or Title in Library holdings (books at Augustana) or I-Share (books in academic libraries across Illinois).
Augustana owns most of the Loeb Classical Library in print, in additional to the digital access linked in the box above. To get a full list in OneSearch, search "Loeb Classical Library" as a Title in Library holdings only.