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Roberts, N.: Historical studies in documentation : the pre-history of the information retrieval thesaurus (1984)
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Pettee, J.: ¬The subject approach to books and the development of the dictionary catalog (1985)
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- Footnote
- Original in: Pettee, J.: The history and theory of the alphabetical subject approach to books. New York: Wilson 1946. S.22-25.
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Pettee, J.: Public libraries and libraries as purveyors of information (1985)
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- Footnote
- Original in: Pettee, J.: The history and theory of the alphabetical subject approach to books. New York: Wilson 1946. S.73-76.
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Pettee, J.: Fundamental principles of the dictionary catalog (1985)
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- Footnote
- Original in: Pettee, J.: The history and theory of the alphabetical subject approach to books. New York: Wilson 1946. S.57-60.