Reference service /

Eitemau Tebyg

• Reference services and sources of information /
  Cyhoeddwyd: (2004)
• Reference service and sources of information /
  Cyhoeddwyd: (1987)
• Reference and information services:an introduction
  gan: Ranjan,Piyush
  Cyhoeddwyd: (2014)
• Reference and information services: an Introduction
  Cyhoeddwyd: (2001)
• Reference and information services introduction
  gan: Bopp, Richard E; ed
  Cyhoeddwyd: (2011)