Reference and information services in the 21st century : an introduction /

Eitemau Tebyg

• Reference and information services in the 21st century : an introduction /
  gan: 458224 Cassell, Kay Ann, et al.
  Cyhoeddwyd: (2009)
• Introduction to reference work /
  gan: Katz, William A., 1924-
  Cyhoeddwyd: (1987)
• Introduction to reference work /
  gan: Katz, William A., 1924-
  Cyhoeddwyd: (2002)
• Introduction to reference work /
  gan: Katz, William A., 1924-
  Cyhoeddwyd: (1992)
• Introduction to reference work /
  gan: Katz, William A., 1924-
  Cyhoeddwyd: (1974)