00523nam a2200169Ia 450000500170000000800460001703700120006304000200007504100130009508400210010810000280012924501090015725000060026626000480027230000130032065000200033320250508150242.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDLbengcFEDL  aeng2eng  a025.4, MERqFEDL  aMerrill William Stetson 0aCode for classifiers: Principles governing the consistent placing of books in a system of classification  a2  aChicagobAmerican Library Associationc1939  axi,177p.  aLibrary Science