@article {2134, title = {A solid state 13C NMR study of kerogen degradation during black shale weathering}, journal = {Geochim. Cosmochim. Acta}, volume = {65}, year = {2001}, note = {id: 277}, month = {2001}, pages = {1867-1882}, author = {Petsch, S. T. and Smernik, R. J. and Eglinton, T. I. and Oades, J. M.} }