| 000 | 00330nam a22000977a 4500 | ||
|---|---|---|---|
| 999 |
_c18564 _d18564 |
||
| 245 |
_aVisual acuity of children : _bUnited States / _cUS Dept. of Health, Education and Welfare |
||
| 260 |
_aWashington, DC : _bHealth Services and Mental Health Administration, _c1970. |
||
| 300 | _a35 p. | ||
| 650 |
_aHealth statistics _vUSA |
||
| 942 | _cRB | ||