Linguistics  

Bussmann, Hadumod. Routledge Dictionary of Language and Linguistics. London; New York: Routledge, 1996.
(DR) P29.B8713 1996

Byram, Michael. The Routledge Encyclopedia of Language Teaching and Learning. London; New York: Routledge, 2000.
(F) P51 .R66 2000

The Cambridge Encyclopedia of the World's Ancient Languages. Woodard, Roger D., ed. Cambridge; New York: Cambridge University Press, 2004.
(SC) (F) P140 .C36 2004

Collinge, N. E., ed. An Encyclopaedia of Language. London; New York: Routledge, 1990.
(F) P106.A46 1990

Crystal, David. The Cambridge Encyclopedia of the English Language. 2nd ed. New York: Cambridge University Press, 2003.
(F) PE1072.C68 2003

Crystal, David. The Cambridge Encyclopedia of Language. 2nd ed. New York: Cambridge University Press, 1997.
(F) P29.C64 1997

Crystal, David. A Dictionary of Language. 2nd ed. Chicago: University of Chicago Press, 2001.
(F) P29.C68 2001

Dalby, Andrew. Dictionary of Languages: The Definitive Reference to More than 400 Languages. London: Bloomsbury, 1998.
(DR) P29.D342 1998

Encyclopedia of language & linguistics. 2nd ed. Brown, Keith, ed.-in-chief. 14 vols. Amsterdam; London : Elsevier, 2006.
(F) P29 .E529 2006

The Encyclopedia of Language and Linguistics. Asher, R.E., ed.-in-chief. 10 vols. Oxford: Pergamon, 1994.
(DR) Oversize P29.E48 1994q
Illustrated articles, with bibliographies, on linguistics, languages and the history of the study of language.

Indo-European Etymological Dictionaries Online. Lubotsky, Alexander, ed.
Lexicon of the most important languages and language branches of Indo-European, including Latin, Greek, Slavic, Proto-Celtic, Old Frisian, Armenian, Hittite, Luvian, the Iranian verb and Proto-Nostratic (Proto-Germanic and Persian are forthcoming).

International Encyclopedia of Linguistics. Bright, William, ed.-in-chief. 4 vols. 2nd ed. New York; Oxford: Oxford University Press, 2003.
(DR) P29.I58 2003
Articles, with bibliographies, on topics in linguistics and on language families.

Malmkjaer, Kirsten, ed. The Linguistics Encyclopedia. 2nd ed. London; New York: Routledge, 2002.
(F) P29.L52 2002

Trask, R. L. A Dictionary of Grammatical Terms in Linguistics. London; New York: Routledge, 1993.
(F) P152.T7 1993
Covers terms from traditional grammar and the major modern theories.

Vachek, Josef. Dictionary of the Prague School of Linguistics. Amsterdam; Philadelphia: John Benjamin, 2003.
(F) P147 .V313 2003