TY - BOOK AU - Black,Ethel R. ED - National Center for Health Statistics (U.S.) TI - Use of special aids, United States, 1977 T2 - Vital and health statistics : series 10, Data from the National Health Survey ; no. 135 U1 - 312.0973021 PY - 1980/// CY - Washington, D.C. PB - United States Government Printing Office KW - Prosthesis KW - United States KW - Statistics KW - Self-help devices for people with disabilities N1 - Prepared by E. R. Black ER -