00866nam--2200325---450-9900005483402033160054834USA010054834(ALEPH)000054834USA01005483420010706d1965----km-y0itay0103----baengGB||||||||001yyOn retrieval system theoryLondonButterworths1965XII, 191 p.ill.21 cm2001029.7VICKERY,B. C.7279ITsalbcISBD990000548340203316029.7 VIC5864029.700107029BKSCIPATTY9020010706USA01124120020403USA011704PATRY9020040406USA011638On retrieval system theory885081UNISA