@book{30292,
	author = {Jackson, Nora. and Penn, Philip},
	title = {A dictionary of natural resources and their principal uses},
	publisher = {Pergamon Press},
	year = {[1969]},
	series = {The Commonwealth and international library. Geography division},
	address = {Oxford},
	edition = {[2d ed.]},
	note = {920212}
}