Non-Yale resources:
Links
[1] https://web.library.yale.edu/cataloging/cartographic
[2] http://www.loc.gov/aba/pcc/bibco/bsr-maps.html
[3] http://www.loc.gov/catdir/cpso/class_g.html
[4] http://www.loc.gov/catdir/cpso/gcutter.html
[5] http://www.acsu.buffalo.edu/~dbertuca/maps/cat/map-cat-toolbox.html
[6] http://www.waml.org/maptools.html
[7] http://rbms.info/files/dcrm/dcrmc/DCRMC.pdf