@article {725,
	title = {The systematic and biogeographical relationships of some <i>Dugesia</i> species (Turbellaria, Tricladida) from Central and South America},
	number = {2472},
	year = {1971},
	month = {10/1971},
	pages = {1-25},
	address = {New York},
	author = {Ian R. Ball}
}
