 adopt librari congress classif system thi manual design librari chang effici librari congress classif system detail procedur outlin serv exact model seri suggest step proven effect actual most text deal criteria effect plan make prepar select tool establish procedur essenti reclassif project beyond consider attent problem area lc classif-seri biographi bibliographi law pz3 pz4 in addit literatur tabl viiia ixa frequent tabl entir class system thoroughli explain applic illustr seri comprehens exampl sinc mechan product cost catalogu card copi affect flow book user chapter devot describ xerox copi machin librari oper final annot bibliographi book articl judg help decid reclassifi includ reader delv deepli tortuou frustrat 50-year histori concept central catalog classif the number enclos parenthes text refer sourc bibliographi relat support argument advanc case 