| 000 | 00422nam a2200181Ia 4500 | ||
|---|---|---|---|
| 008 | 210210b1966 xxu||||| |||| 00| 0 eng d | ||
| 041 | _aeng | ||
| 082 | _a539/54 | ||
| 100 | _aIrwin (Keith Gordon) | ||
| 245 | _aCircle of days:measurement of time | ||
| 260 |
_a _bNot Mentioned _c1966 |
||
| 300 | _a116 | ||
| 650 | _atime | ||
| 650 | _adays:measurement | ||
| 650 | _aCircle | ||
| 690 | _aPhysics | ||
| 906 | _a009070 | ||
| 999 |
_c127819 _d127819 |
||