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|a National Academy of Sciences. Committee on Scientific and Te
|9 95353
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| 245 |
1 |
0 |
|a Scientific and technical communicaction :
|b a pressing national problem and recommendations for its solution
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| 260 |
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|a Washington :
|b National Academy of Sciences,
|c 1969.
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| 300 |
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|a xiii, 322 p. :
|b tablas ;
|c 23 cm.
|
| 490 |
0 |
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|a National academy of sciencies ;
|v 1707
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| 500 |
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|a Bibliografía, p.285-306 Apéndices, p.307-317
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| 650 |
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4 |
|a INFORMACION, TEORIA DE LA
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| 942 |
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|z a
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