Hi Caroline, You’ll probably get a lot of replies to this, since USGS maps are near and dear to the hearts of traditional map librarians. ☺ A brief overview of USGS and other US government agency maps is the books Maps for America, which is available online as are most USGS publications. There’s a link to the gigantic PDF (283 pages) of the third edition (1988) from this summary page: https://pubs.er.usgs.gov/publication/70178836 I found the copy of the 1981 2nd edition much more legible online: https://pubs.er.usgs.gov/publication/70039239 and the pertinent pages appear to be the same. The 1:100,000 series topos are discussed in the section “Intermediate-Scale Maps” beginning on p. 112 of the book, although the other sections about USGS topographic maps provide more information and context. The Bureau of Land Management also uses these 1:100k quadrangles as a basis for their Surface Management and Surface/Minerals Management series of maps, showing management responsibility and minerals rights on lands (mostly all in the western US) administered by the BLM. These are mentioned, for instance, in a library guide from the University of Illinois at Chicago: http://researchguides.uic.edu/govmaps/publands Regards, Mark +++++++++++++++++++++++++++++++++++++++++++++++ Mark A. Thomas, GIS, Map, & Federal Documents Librarian Subject Librarian for Economics and Geography 226B Bostock Library / 919-660-5853 / [log in to unmask]<mailto:[log in to unmask]> From: Maps-L: Map Librarians, etc. [mailto:[log in to unmask]] On Behalf Of Caroline Tourette Sent: Friday, January 20, 2017 9:13 AM To: [log in to unmask] Subject: USGS 30x60 minute series Hi all, I'm a librarian in La Sorbonne library, geography department. Apologies for my english. We did in the end of 2016 the cataloging of a USGS serie, called with different names : "30 x 60 minute series (topographic)" (we have a few "planimetric" too) ; "1:100 000-scale metric topographic map of...", and follows the name of a town or a site ; "30x60 minute quadrangle". This maps were produced in the 70's and 80's by the USGS. The library have a great part of this serie for many years now. I'd like to make a brief history of this production, to inform my patrons and enhance this collection. I searched in the USGS website, but I found very few informations. Do you know if there is a (historical) review of this map serie somewhere online ? Or in a print document (and I'll try to get this document afterwards) ? Thank you ! Best regards, -- Caroline Tourette Tél. 01 44 32 14 61 [Bibliothèque de géographie] Institut de Géographie 191, rue Saint Jacques 75005 Paris