Hope, A.D. (Alec Derwent), 1907-2000, author
Oxford University Press, 1975
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Harris, Dean M., 1951-, author
Jossey-Bass, 2011.
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Kuhlthau, Carol Collier, 1937-, author
Libraries Unlimited, 2004
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Lutz, Frank W.
Charles E. Merrill Publishing Company, 1969
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Robert Miller... [et al.]
The Population council, 1997
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