International Federation of Library Associations and Institutions. Section of Geography and Map Libraries, Carrington, D. K., Grim, R. E., & Wolter, J. A. (1986). World directory of map collections (Second edition.). K.G. Saur.
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Chicago Style (17th ed.) Zitazioa
International Federation of Library Associations and Institutions. Section of Geography and Map Libraries, David K. Carrington, Ronald E. Grim, eta John Amadeus Wolter. World Directory of Map Collections. Second edition. Munchen ; New York: K.G. Saur, 1986.
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MLA (9th ed.) Zitazioa
International Federation of Library Associations and Institutions. Section of Geography and Map Libraries, et al. World Directory of Map Collections. Second edition. K.G. Saur, 1986.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.