The target resource for this PURL can no longer be traced. The following is a list of the targets this PURL was previously assigned to.
| Timestamp | Target URL | Note |
|---|---|---|
| 10/14/10 21:00:45 | http://bookstore.gpo.gov/subjects/sb-116.jsp | |
| 03/26/13 07:51:35 | http://permanent.access.gpo.gov/410.html | |
| 09/22/16 09:12:53 | http://purl.fdlp.gov/history/GPO/LPS29139 | Subject bibliographies have been morphed into the GPO Bookstore, with the subject titles often changing or disappearing altogether. |