1. Major, minor and trace element composition of coal and fly ash, as determined by instrumental neutron activation analysis;Abel,1975
2. The effect of climate and facies environment on the fractionation of the rare earths during sedimentation;Balashov;Geochem. Int.,1964
3. Quantitative coal mineralogy of the Sydney Coalfield, Nova Scotia, Canada, by scanning electron microscopy, computerized image analysis, and energy-dispersive X-ray spectrometry;Birk;Can. J. Earth Sci.,1990
4. Trace elements in bituminous coals, roof clays, and underclays of the Sydney Basin, Nova Scotia: ash chemistry, element sites, and mineralogy;Birk,1990
5. The occurrence and distribution of trace elements in minerals and macerals of bituminous seams: Sydney Coalfield, Nova Scotia, Canada. (abstract);Birk;J. Coal Qual.,1989