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BR IFIC 2835 S - DVD
BR International Frequency Information Circular (BR IFIC) - Space Service (2016)
Yearbook of Statistics 2014
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BR International Frequency Information Circular (BR IFIC) - Space Service (2021)
BR IFIC 2852 Space - ISO Copy of DVD
BR International Frequency Information Circular (BR IFIC) - Space Service (2017)
Yearbook of Statistics 2010
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Information technology – Open Systems In
OSI Directory -Models
BR IFIC 3003 T - DVD
BR International Frequency Information Circular (BR IFIC) - Terrestrial Services (2023)
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ITU Yearbook of Statistics - Telecommunication Services 1996-2005 (33rd Edition, 2007)
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BR International Frequency Information Circular (BR IFIC) - Space Service (Edition of 2014)
BR IFIC 2868 Space - ISO Copy of DVD
BR International Frequency Information Circular (BR IFIC) - Space Service (2018)