00413nam a2200133Ia 4500082001900000100001600019245003700035260003200072300000600104490004400110500011500154500000500269700000500274  a025.52bK19.IR  aKatz, W. A.  aIntroduction to reference workb  aNew YorkbMcGraw-Hillc1969  a   aMcGraw-Hill series in library education  aLib has :- v.1- Basic information sources. xi, 376p. Index, Appendix ; v.2- Reference services. xi,254p. Index  a  a