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1Published 1993Subjects: “...Communication and traffic United States Statistics....”
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2Published 1999Subjects: “...Communication and traffic United States Statistics....”
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Government Document Serial -
3Published 1992Subjects: “...Communication and traffic United States Statistics Periodicals....”
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4Published 1996Subjects: “...Communication and traffic United States Directories....”
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Serial -
5
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Government Document Serial -
6