Searching by SuDoc
Many government publications are assigned Superintendent of Documents (SuDocs) numbers, unique strings of numbers and letters that indicate the agency that issued a publication, and what kind of publication it is. At some UW-Madison libraries, U.S. government publications are shelved by SuDocs numbers.
If you have a SuDocs number for the item you wish to locate, you can do an advanced search for the SuDocs number in the UW-Madison libraries catalog's identifier or call number fields. Capitalization and punctuation do matter when searching by SuDoc. You might find a record in the catalog that tells you what library owns the item, and what call number (which may or may not be the SuDoc number) you should use to locate the item.