Geolinguistic perspectives : proceedings of the International Conference Celebrating the Twentieth Anniversary of the American Society of Geolinguistics, 20 and 21 April, 1985 at Andre and Bella Meyer Hall of Physics, New York University, New York, N.Y. - International Conference Celebrating the Twentieth Anniversary of the American Society of Geolinguistics (1985 : New York University); Levitt, Jesse; Ashley, Leonard R. N.; Rogers, Kenneth H.; American Society of Geolinguistics (University Press of America, 1987)