@book{110261,
	author = {Broedel, Carl Huntington and Puerto Rico.},
	title = {Preliminary geologic map showing iron and copper prospects in the Juncos quadrangle, Puerto Rico},
	publisher = {United States Geological Survey},
	year = {1961.},
	series = {Miscellaneous geologic investigations map / United States Geological Survey},
	address = {Washington, D.C.},
	note = {Includes text and two tables on sheet.}
}