universal service fund
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9
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H-INDEX
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2020 ◽
pp. 171-216
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2019 ◽
Vol 21
(2)
◽
pp. 102-114
2014 ◽
Vol 496-500
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pp. 2840-2843
2009 ◽
Vol 34
(6)
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pp. 1023-1031
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2009 ◽
Vol 33
(3-4)
◽
pp. 111-128
◽