Katz, William A., 1924-
Introduction to reference work; Volume II: reference services and reference processes
McGraw-Hill, 1987
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Katz, William A., 1924-
Introduction to reference work volume II: reference services and reference progresses
McGraww-Hill, 1992
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Katz, Wiliiam A.
Introduction to reference work : volume II, reference services and reference processes / William A. Katz
McGraw-Hill, 1992
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Katz, Wiliiam A.
Introduction to reference work : volume I, basic information sources / William A. Katz
McGraw-Hill, 1992
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Wynar, Bohdan S.
Introduction to bibliography and reference work: a guide to materials and sources / Bohdan S. Wynar
Libraries Unlimited, Inc., 1967
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