----------------------------Original message---------------------------- we're buying the usgs backfile of 7.5- and 15-minute quadrangles on microfilm. these are the same rolls issued to usgs/esic state affiliates. we cannot find master or model cataloging records for this series. if anyone has created any, state-by-state or a master record for the series, would you please send me a sample? the quads are indexd by microfilm roll and frame number on the "Map and Chart Information System." We are unable to find a master serial record for the fiche version of that index. Does anyone have a clue as to why, or where to find one? Thanks. Larry Cruse ([log in to unmask])