Multiple copies may be purchased for high demand titles and/or titles authored by MSU faculty.
Replacement copies may be ordered, as funds permit, for missing or damaged heavily-used titles or parts of multi-volume works.
Out-of-print materials are not normally considered for purchase, unless there is a compelling need for a unique item that has been officially classified as missing or damaged beyond repair.
Materials no longer needed for the collection are de-selected as identified.
Preservation decisions follow the general guidelines established by the Main Library.