International Journal of Coal Geology International Journal of Coal Geology, Vol.169 Entire volume, number list ISSN: 0166-5162 (Print) In this Issue (8 articles) 1 - 21 Image processing based characterisation of coal cleat networksBusse J, de Dreuzy JR, Torres SG, Bringemeier D, Scheuermann A 22 - 27 Biogenic methane production from Bowen Basin coal waste materialsZheng H, Chen TY, Rudolph V, Golding SD 28 - 39 Rare earth element resources in coal mine drainage and treatment precipitates in the Appalachian Basin, USAStewart BW, Capo RC, Hedin BC, Hedin RS 40 - 61 Classification of liptinite - ICCP System 1994Pickel W, Kus J, Flores D, Kalaitzidis S, Christanis K, Cardott BJ, Misz-Kennan M, Rodrigues S, Hentschel A, Hamor-Vido M, Crosdale P, Wagner N 62 - 73 Pore-scale lattice Boltzmann simulation of micro-gaseous flow considering surface diffusion effectWang JJ, Kang QJ, Chen L, Rahman SS 74 - 91 Organic shale wettability and its relationship to other petrophysical properties: A Duvernay case studyYassin MR, Begum M, Dehghanpour H 92 - 105 Development and testing of a model for simulating weathering and trace elements release from fixated scrubber sludge utilized in abandoned coal mine reclamation siteZhang Q, Branam T, Olyphant G 106 - 115 TOC calculation of organic matter rich sediments using Rock-Eval pyrolysis: Critical consideration and insightsHazra B, Dutta S, Kumar S