--- Begin Forwarded Message --- Date: Mon, 28 Oct 2002 15:44:06 -0500 From: Virginia Rasbold <[log in to unmask]> Subject: USGS map series codes Sender: Virginia Rasbold <[log in to unmask]> Hi All, I've just started cataloging maps and am working on the USGS 1:24,000-scale topographic maps. I need some help understanding what I'm looking at. I have two maps of Big Meadows Quadrangle, Virginia 7.5 minute series, 1965, photorevised 1979. The information on the maps is identical except for the following information. One map has "DMA 5361 III SW-Series V834" and "38078-E4-TF-024". The other has "AMS 5361 III SW-Series V8334" and "N3830-W7822.5/7.5" What do these numbers refer to? And, more importantly, does the fact that these numbers are different mean that I need two separate bibliographic records for the two maps? The records on OCLC were created by staff in our library before my time here, and my library is the only one who has any holdings attached to the records. I want to know if the two records are necessary or if one would suffice. I would appreciate any guidance in this area that you can give. Thank you. Virginia Rasbold Catalog Librarian Lewis J. Ort Library Frostburg State University Frostburg, Md. 21532 Phone: 301-687-4884 Email:[log in to unmask] --- End Forwarded Message ---