Index to Illinois digital orthophotoquads on CD-ROM held by the Illinois State Library.
APA Citation
Illinois State Library. (2003). Index to Illinois digital orthophotoquads on CD-ROM held by the Illinois State Library. [Springfield, Ill.: Illinois State Library].
MLA Citation
Illinois State Library. Index to Illinois Digital Orthophotoquads On CD-ROM Held by the Illinois State Library. [Springfield, Ill.: Illinois State Library], 2003.
Warning: These citations may not always be complete (especially for serials).