----------------------------Original message---------------------------- Hi all! I have a question regarding the "Preliminary Map Series" and the "'A' Map Series" issued by the Geological Survey of Canada. We have a rather large set (dare I say nearly complete set??) of both of these series at our Library and would like to catalog them. It appears as though some of the "Preliminary Series Maps" were superceded by the "'A' Series Maps". (Random sampling in the GSC catalog confirms about a 10-20% hit rate on this theory). So, my question is, does anyone recall seeing a listing of what has been superceded in the "Preliminary Map Series"? And how are others of you handling the cataloging of this mongo-huge series? We are planning to handle it like an open-file or miscellaneous series--classing them together, but giving each map an individual record (much to the consternation of our Maps cataloger, who is unknowingly touring the Pennsylvania countryside as I broach this subject with you all!) Any help in locating a list of superceded "Prelimnary Map Series" titles would be greatly appreciated, as would any thoughts on how others have dealt with these series. Thanks in advance. Lisa Lisa A. Recupero Earth and Mineral Sciences Library 105 Deike Building Pennsylvania State University University Park, PA 16802 USA phone: 814/865-3694 email: [log in to unmask] web: http://vector.gis.psu.edu/emsltop.html