Signs Across America
Shroyer, E. H., & Shroyer, S. P. (1984). Signs Across America. Washington, DC: Gallaudet College Press.
Signs Across America provides a fascinating and unique look at regional variations in American Sign Language (ASL). The authors contacted native signers in 25 states to find out their signs for 130 selected words. The results -- more that 1,200 signs -- are illustrated in this book. It is an invaluable reference for teachers of American Sign Language that explores the subtle differences in signs from different geographic areas.