----------------------------Original message---------------------------- Hello, map catalogers: We've recently begun cataloging maps on OCLC here, and have been inserting a 690 (local subject geographic) field to include quadrangle names when appropriate. However, I have been unable to decide how to distinguish between different size quads in these subject headings. So, here is my question: Does anybody who does this distinguish between 24k, 62.5k, 100k and 250k quadrangles in their subject headings, and how do you do so? You can reply to me directly, or over the net if you think other folks will be interested. Jim O'Donnell Caltech Geology & Planetary Sciences Library [log in to unmask]