@article {1839,
	title = {Freshwater cavernicole planarians from Mexico: New troglobiotic and troglophilic <i>Dugesia</i> from caves of the Sierra de Guatemala},
	journal = {Annales de Sp{\'e}l{\'e}ologie},
	volume = {27},
	year = {1973},
	pages = {639-681},
	author = {Robert W. Mitchell and Masaharu Kawakatsu}
}
