Citation: Cui, C.; Chang, S.; Yao, Y.; Cao, L. Quantify Coal Macrolithotypes of a Whole Coal Seam: A Method Combing Multiple Geophysical Logging and Principal Component Analysis. Energies 2021, 14, 213. https://doi.org/10.3390/ en14010213 Received: 14 November 2020 Accepted: 30 ...