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_aAcademia Nacional de Ciencias. Washington, D. C. _9383 |
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| 245 | _aConcepts of biology | ||
| 260 |
_aWashington : _bNAS, _c1958 |
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| 300 | _a215 p. | ||
| 490 |
_aNAS. Publication _v; 560 |
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| 590 |
_aBATCH-UPD _b10 _c20130110 _lUCH01 _h0051 |
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| 650 | 1 | 4 |
_aBiología. _912773 |
| 700 | 0 |
_aGerard, Ralph Waldo. _947701 |
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| 830 | 0 |
_aNAS. Publication _v; 560 _980258 |
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