The FDLP Regional Depositories are currently required to keep the most recent printed edition of all states.  The USGS online site and the newer digital versions do not officially supersede the latest print edition.  That means that the 46 Regional FDLP libraries in the US should be maintaining complete sets.

I keep looking for a citation for this information.  The 7.5’ maps were issued under several different SuDocs, so does that mean that you might ‘have’ to have the final edition of, say, a USGS produced quad as well as the subsequent USGS-printed but USFS-paid-for edition of the same quad?  Different SuDoc number, perhaps even a different collective title.

Jon I-am-neither-a-docs-librarian-nor-a-Cataloger Jablonski.