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Stock, M; Conceição, P; Fang, H; Bielsa, F; Kiss, A; Nielsen, L; Kim, D; Kim, M; Lee, K -C; Lee, S; Seo, M; Woo, B -C; Li, Z; Wang, J; Bai, Y; Xu, J; Wu, D; Lu, Y; Zhang, Z; He, Q; Haddad, D; Schlamminger, S; Newell, D; Mulhern, E; Abbott, P; Kubarych, Z; Kuramoto, N; Mizushima, S; Zhang, L; Fujita, K; Davidson, S; Green, R G; Liard, J O; Murnaghan, N F; Sanchez, C A; Wood, B M; Bettin, H; Borys, M; Mecke, M; Nicolaus, A; Peter, A; Müller, M; Scholz, F; Schofeld, A (2020) Report on the CCM key comparison of kilogram realizations CCM.M-K8.2019. Metrologia, 57 (1A). 07030 ISSN 0026-1394