db/conf/dl/CrespoG98.html Arturo Crespo Hector Garcia-Molina Archival Storage for Digital Libraries. 69-78 DL1998/P069.pdf 1998 conf/dl/98 ACM DL db/conf/dl/dl98.html#CrespoG98 http://doi.acm.org/10.1145/276675.276683