00331nam a22001217a 4500003000400000005001700004008004100021020002200062040000800084100002700092245004200119260004800161OSt20190314125655.0190314b        xxu||||| |||| 00| 0 eng d  a978-1-107-66639-9  cn/a  aChristopher D. Manning  aIntroduction to Information Retrieval  aNew DelhibCambridge University Pressc2008