My Deaf friends in Dar es Salaam, Tanzania have told me the the sign language used in Moshi and Arusha is different than the signed languages used in other parts of Tanzania. They asked me to look for any research on the signed language(s) used there. I thought it would be easy to find published articles and perhaps even a thesis or a dissertation but I am not finding any published papers. I heard about someone, maybe from Finland, working on a dictionary in that area but again I have not found a reference.