@book {309808,
	title = {Monastic Sign Languages},
	series = {Approaches to Semiotics [AS]},
	year = {1987},
	publisher = {De Gruyter},
	organization = {De Gruyter},
	isbn = {9783110865028},
	url = {https://books.google.com/books?id=Q3YiWg6Yp6EC},
	author = {Umiker-Sebeok, J. and Sebeok, T.A.}
}
