We have been looking for this document on the Web. We think we have found the following, freely available version(s) of it: http://cm.bell-labs.com/who/clarkson/Msb/white_paper.pdfhttp://db.uwaterloo.ca/~gisli/pami03.pdfhttp://garota.fismat.umich.mx/%7Eelchavez/publica/survey.ps.gzhttp://www.cs.umd.edu/~hjs/pubs/metricpruning.pdfhttp://www.dcc.uchile.cl/~gnavarro/ps/acmcs01.2.ps.gzFor further information about this item go to:http://doi.acm.org/10.1145/502807.502808