| 000 | 00491nam a22001577a 4500 | ||
|---|---|---|---|
| 008 | 230310b |||||||| |||| 00| 0 eng d | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 080 | _aD 025.49LC | ||
| 245 |
_aLibrary congress classification: _bClass q. science _c/Library of congress |
||
| 250 | _a5th ed. | ||
| 260 |
_aWashington: _bThe library of congress, _c1950 |
||
| 300 | _a285p. | ||
| 650 | _aClassification | ||
| 653 | _aLibrary of congress | ||
| 942 |
_2udc _cREF |
||
| 999 |
_c7721 _d7721 |
||