----------------------------Original message---------------------------- A library colleague suggested I send this query (which I posted to govdoc-l) to this list. Please reply to me since I don't subscribe to maps-l. Thanks in advance for any info. One of our geology faculty (the one in charge of maintaining the topo map collection, a labor of love) asked me if there was a cd-rom or online source which would list which are the most recent versions of topo quadrangles. I wandered around in the usgs sites for a while and didn't find a list like this; I rather suspect one doesn't exist. But I really don't know too much about the map scene, so I thought I'd ask here for the final authority. Thanks for any info, even a negative answer. Kathy Amen [log in to unmask] St. Mary's Univ. Academic Library San Antonio, Texas