@book{19107,
	author = {Williams, Paul W. and Jennings, J. N. and International Geographical Congress},
	title = {Contributions to the study of karst},
	publisher = {Australian National University},
	year = {[1968]},
	series = {Australian National University, Canberra. Research School of Pacific Studies. Dept. of Geography. Publication},
	address = {Canberra,},
	note = {Two papers delivered at Twentieth International Geographical Congress, Settle and Buxton, Eng., July-August 1964.}
}