| 000 | 00375cam a22001097a 4500 | ||
|---|---|---|---|
| 008 | 180718b1971 xxu||||| |||| 00| 0 eng d | ||
| 082 | _aO91x73 Un3 | ||
| 245 |
_aEnvironmental science: challenge for the seventies: report _cby National Science Board |
||
| 260 |
_aWashington, D. C. _bU.S. Government Printing Office _c1971 |
||
| 300 | _a50p. | ||
| 700 | _aU.S.National Science Board | ||
| 999 |
_c494206 _d494206 |
||