All depository libraries provide reference assistance and participate in interlibrary loan.
In addition to the 17 depositories, the Clearinghouse also provides copies of state publications to the State Documents Section of the Library of Congress. A complete list of depositories follows below, but you may also locate the OPC depository libraries near you by clicking on the numbers on the image map above. Addresses, phone numbers and contact persons for the libraries are included on this list. Back to Clearinghouse 15.