conf/sigmod/76 James W. Welch J. Wesley Graham Retrieval Using Ordered Lists in Inverted and Multilist Files. 21-29 1976 SIGMOD Conference db/conf/sigmod/sigmod76.html#WelchG76 http://doi.acm.org/10.1145/509383.509387 SIGMOD76/P021.PDF journals/csur/Dodd69 ... ... ... ... conf/sigmod/WelchG75