KO KNOWLEDGE ORGANIZATION / Evans, G. Edward, Heft, Sandra M.: Introduction to Technical Services, 6th ed. Englewood, Colo: Libraries Unlimited, 1994. XXI, 534p. (Library Science text series). ISBN 0-87287-966-6 (M. P. Satija)
KO KNOWLEDGE ORGANIZATION / Evans, G. Edward, Heft, Sandra M.: Introduction to Technical Services, 6th ed. Englewood, Colo: Libraries Unlimited, 1994. XXI, 534p. (Library Science text series). ISBN 0-87287-966-6 (M. P. Satija)