@book{sparck-jones+willett97, editor = {Sparck-Jones, K. and Willett, P.}, interhash = {9316414517263caed642f5f72e864033}, intrahash = {887f48afcb0104e36e7d755b204cc659}, key = {sparck-jones+willett97}, label = {Readings in Information Retrieval}, publisher = {Morgan Kaufmann}, title = {Readings in Information Retrieval}, type = {Book}, year = 1997 }