@book{52697,
	author = {MacDonald, Donald F.},
	title = {The sedimentary formations of the Panama canal zone, with special reference to the stratigraphic relations of the fossiliferous beds.},
	publisher = {Govt. print. off.,},
	year = {1919.},
	series = {Smithsonian institution, United States National museum. Bulletin 103 [pt.10]},
	address = {Washington,},
	note = {At head of title: Contributions to the geology and paleontology of the canal zone, Panama, and geologically related areas in Central America and the West Indies.}
}