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View Teaching and using Blissymbolics By Eugene T. McDonald 
Teaching and using Blissymbolics
By Eugene T. McDonald
View Non-vocal communication techniques and aids for the severely physically handicapped By Eugene T. McDonald,Gregg C. Vanderheiden,Kate Grilley 
Non-vocal communication techniques and aids for the severely physically handicapped
By Eugene T. McDonald,Gregg C. Vanderheiden,Kate Grilley