| 000 | 00716cam a2200205 4500 | ||
|---|---|---|---|
| 999 |
_c11121 _d11121 |
||
| 020 | _a0070280452 | ||
| 082 | 0 | 0 | _aCir 550 C35 1973 |
| 245 | 0 | 0 |
_aEarth science _cby Robert L. Heller, et al… |
| 260 |
_aNew York, _bMcGraw-Hill Book Company _cc1973. |
||
| 300 |
_axi, 468 p. _billus. _c25 cm. |
||
| 490 | 0 | _aChallenges to science | |
| 520 | _aA science text book for the middle grades which stresses basic, general concepts of earth science, the environment, and space science. | ||
| 526 | _a500-599 | ||
| 650 | 0 | _aEarth sciences — Juvenile literature. | |
| 650 | 0 | _aAstronomy — Juvenile literature. | |
| 650 | 1 | _aEarth sciences. | |
| 650 | 1 | _aAstronomy. | |
| 700 | 1 | _aHeller, Robert L. | |
| 942 |
_2ddc _cBK |
||