1. Vitrinite reflectance geothermometry in the Cerro Prieto geothermal system, Baja California, Mexico;Barker,1979
2. Physical and geochemical conditions of organic metamorphism next to selected dikes, Victoria, Australia;Barker,1994
3. Concentration of dispersed sedimentary organic matter for vitrinite reflectance analysis using a simple crush and float method;Barker;Soc. Org. Pet. Newsletter,1986
4. An empirical determination of the minimum number of measurements needed to estimate the mean random vitrinite reflectance of disseminated organic matter;Barker;Org. Geochem.,1993
5. Paleotemperatures based on vitrinite reflectance of shales and limestones in igneous dike aureoles in the Upper Cretaceous Pierre Shale, Walsenburg, Colorado;Bostick,1984