Picture communication symbols

Xehetasun bibliografikoak
Egile nagusia:	Johnson, Roxanna Mayer
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	Solana Beach, Calif. Mayer-Johnson c1995.
Edizioa:	Wordless ed.
Gaiak:	Nonverbal communication in education. Special education. Self-help devices for people with disabilities. Signs and symbols. Visual communication.