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APA-referensHedblad, A. (2003). Directory of special libraries and information centers: A guide to more than 34,000 special libraries, research libraries, information centers, archives, and data centers maintained by government agencies . (28. ed.). Thomson Gale.
Chicago-stil citatHedblad, Alan. Directory of Special Libraries and Information Centers: A Guide to More than 34,000 Special Libraries, Research Libraries, Information Centers, Archives, and Data Centers Maintained by Government Agencies . 28. ed. Farmington Hills (Mich.): Thomson Gale, 2003.
MLA-referensHedblad, Alan. Directory of Special Libraries and Information Centers: A Guide to More than 34,000 Special Libraries, Research Libraries, Information Centers, Archives, and Data Centers Maintained by Government Agencies . 28. ed. Thomson Gale, 2003.
Harvard-stil citatHedblad, A. 2003. Directory of special libraries and information centers: A guide to more than 34,000 special libraries, research libraries, information centers, archives, and data centers maintained by government agencies . 28. ed. Farmington Hills (Mich.): Thomson Gale.