Hours of operation vary slightly from general building hours and are posted by the entrances to the Microforms Center and under Library Hours .
Staff is available whenever the unit is open to assist patrons and circulate materials.
Organizationally, the Microforms Center is part of the ISU Library's Access Services Department and Public Services and Collections Division . The Microforms Center houses more than two million microforms, including journal and newspaper backfiles, government documents, technical reports, unpublished education documents, company annual reports, and college catalogs. Research materials representing a wide range of subject areas are also held in microform, such as retrospective collections of early American and British books and serials, landmark scientific publications, international agricultural publications, archive and manuscript collections, historic architectural drawings, early Iowa census schedules, early Iowa city maps, herbaria collections, art works reproduced in color, and many others. Access Most of the Library's microform materials have been cataloged, and are accessible through the Library Catalog , the online catalog. These uncataloged materials must be identified by using appropriate indexes located in the Reference Collection or by using individual collection guides located in the Microforms Center.