00494nam a2200157Ia 4500008004100000020001500041082001400056100001800070245011300088260004500201300000800246650001600254650003700270653001500307653001400322170901s1980    xx            000 0 und d  a0851573088  a021bB58D  aBlagden, John 0aDo we really need libraries ?bAn Assessment of Approaches to the Evaluation of the Performance of Libraries  aNew YorkbK. G. Saur Clive Bingleyc1980  a162  aGneralities  aLibrary and Information sciences  aEvaluation  aLibraries