----------------------------Original message---------------------------- Hello, My library assistant just showed me that the latest USGS topo sheets we received had barcodes and ISBN numbers in the margin. How long has this been going on? Is it a new thing, or am I just behind the curve. (I don't unpack the depository mail.) Do any institutions out there use these barcodes for any purpose (circulation, for instance)? Sue Haffner, CSU Fresno Map Library