Oerik is the largest continent on the world of Oerth, where the Greyhawk campaign takes place. The best-known part of Oerik is the eastern portion, known as the Flanaess.
Anne Brown (1998). Greyhawk Player's Guide. TSR. ISBN 0-7869-1248-0.
There is an article about Oerik at the Great Library of Greyhawk.
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