Richard Marciano Bertram Ludäscher Ilya Zaslavsky Reagan Moore Keith Pezzoli Multi-level Information Modeling and Preservation of eGOV Data. 93-100 2002 conf/egov/2002 EGOV http://link.springer.de/link/service/series/0558/bibs/2456/24560093.htm db/conf/egov/egov2002.html#MarcianoLZMP02