Textbooks may, however, be acquired if they represent significant contributions to the presentation of a subject or if there is a scarcity of other material in the field. The purchase of multiple copies is discouraged. A later edition of a monograph already in the collection is acquired only when the new or revised material justifies its purchase. Government Documents . The Library is a depository for U.S., U.N., and E.E.C. documents.
Software is an appropriate format in which to purchase library materials.
Software purchased for the collection will be of research or instructional value and will provide unique access to information. Consideration is made whether hardware for particular formats is available. Word processing and business application programs will normally be excluded. Films and videos are selected as research or instructional materials. Feature films are purchased selectively and only with respect to their research or instructional value.