Harry Beck (Indonesian Wikipedia)
Analysis of information sources in references of the Wikipedia article "Harry Beck" in Indonesian language version.
doi.org
- Kent, Alexander J. (1 Februari 2021). "When Topology Trumped Topography: Celebrating 90 Years of Beck's Underground Map". The Cartographic Journal. 58: 1–12. doi:10.1080/00087041.2021.1953765
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