| 000 | 00392nam a22000977a 4500 | ||
|---|---|---|---|
| 999 |
_c19040 _d19040 |
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| 245 |
_aIntellectual development of children by demographic and socioeconomic factors : _bUnited States / _cUS Department of Health, Education, and Welfare |
||
| 260 |
_aMaryland : _bUS Department of Health, Education, and Welfare _c1971. |
||
| 300 | _a71 p. | ||
| 650 |
_aIntellectual development _vChildern |
||
| 942 | _cRB | ||