00299nam a2200097Ia 4500008004100000082002100041100002500062245007400087250000900161260003100170220204s9999    xx            000 0 und d  a025.5:681.3bLAN  aLancaster, F Wilfred 0aInformation retrieval systems: Characteristics testing and evaluation  aEd.2  aNew YorkbJohn Wileyc1979