TY  - BOOK
AU  - Tetzchner, Stephen von 
AU  - Martinsen, Harald [author.]
TI  - Introduction to sign teaching and the use of communication aids
SN  - 1870332288
U1  - 419 TET M 
PY  - 1992///
CY  - London : 
PB  - Whurr, 
KW  - Sign languages
KW  - Nonverbal communication
ER  -