1A detailed discussion as to how coordinated use might be made of the "Principal Players" can be found in McKendrick O (1991) Assessment of Multi-handicapped visually impaired children. Royal National Institute for the Blind, London.
In the context of this book, within the UK, there is a selection to be found;
Royal National Institute for the Blind
Enable (Spastics Society (England and Wales))
Enable (Scottish Council for Spastics)
Scottish Society for Mental Health.
Parents may find help and support from local or national parent support groups. Fortunately for parents, these are too numerous to list in this book