Acquisition and generalization of manual signs with hearing-handicapped mentally retarded persons

ā- Conaghan, Brian Patrick
I whakaputaina 1984

Early communication skills for children with down syndrome : a guide for parents and professionals /

ā- Kumin, Libby
I whakaputaina 2012

Enhancing communication : a guide to communicating with children, aged 5 years & over, who have special needs /

ā- Godfrey, Debbie
I whakaputaina 1998

Improving the communication of people with Down syndrome /

I whakaputaina 1999

Speech and language intervention in Down syndrome /

I whakaputaina 2003