Survey of Business Transactions for the Analysis of Portal Site Market Environment, 2012 : Advertiser
https://doi.org/10.22687/KOSSDA-A1-2012-0085-V1.0
internet industry online industry online business portal portal service internet advertising online advertising
Measured since the release date of the current version data.
If the data were released before May 11, 2017, it was measured since May 11, 2017.
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