The reference tools shown here will include both paper and electronic resources, as both can be very important.
Electronic resources are listed in the box on the right. Here is a selection of paper resources, mostly housed in the Reference collection in the Rockefeller Library. This is only a selection -- you will find more on the shelves nearby.
Basic -- Dictionaries
The major Greek-English dictionary
The major Latin-English dictionary, but still useful is the older classic: Lewis & Short.
A much more advanced dictionary, all in Latin. Also available online (see box on right).
This and the next two resources are for later (non-classical) Greek.
A classic work for medieval and later Latin, old but still useful.
A more recent dictionary of medieval Latin, especially based on historical and archival texts.
Basic -- Encyclopedic works
Paulys real-encyclopädie der classischen Altertumswissenschaft
The original encyclopedia of Classical culture, updated and translated by the next item (which is also available online)
The basic section (Antiquity) covers the ancient world, but there are several supplements that are also very useful.
Oxford Classical Dictionary (4th ed.)
A one-volume quick reference.
with supplements following it on the shelf.