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통계청, 2020-04-27, 통계연구, vol. 25, no. 2, pp. 49 - 77
통계청, 2020-06-15, 통계연구, vol. 25, no. 3, pp. 54 - 78
2021-09-30, 통계연구, vol. 26, no. 3, pp. 33 - 65