Arofan, As you complete them sed previes of: physicaldatastructure as scheme proprietary layout datatype stuff Wendy Wendy L. Thomas Phone: +1 612.624.4389 Data Access Core Director Fax: +1 612.626.8375 Minnesota Population Center Email: wlt at pop.umn.edu University of Minnesota 50 Willey Hall 225 19th Avenue South Minneapolis, MN 55455