@book{27321,
	author = {Simpson, J. B. and Richey, J. E.},
	title = {The geology of the Sanquhar coalfield and adjacent basin of Thornhill,},
	publisher = {H.M. Stationery Off.,},
	year = {1936.},
	series = {Memoirs of the Geological Survey: Scotland},
	address = {Edinburgh,}
}