Betty Salzberg Access Methods. 117-120 1996 28 ACM Comput. Surv. 1 db/journals/csur/csur28.html#Salzberg96 CSURs1/csur28/P117.pdf db/journals/csur/Salzberg96.html journals/acta/BayerM72 journals/ibmrd/Easton86 conf/vldb/EvangelidisLS95 journals/tods/FaginNPS79 conf/sigmod/Guttman84 conf/vldb/Litwin80 conf/sigmod/LometS90 books/ph/Salzberg88