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00736nam a2200205 u 4500 |
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20110720143301.0 |
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s1971 s1971 xxu ||||| spa |
| 035 |
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|a 50041
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|a Sistema de Bibliotecas de la Universidad de Costa Rica
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0 |
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|a spa
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0 |
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|a 507
|b W442s
|2 00
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| 100 |
1 |
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|a Welch, Wayne W.
|e Autor/a
|4 aut
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| 245 |
1 |
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|a A Summary of research in science education for the years 1968-69 secondary school level /
|c by Wayne W. Welch. --
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| 260 |
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|a Columbus :
|b Ohio State University ERIC Information Analysis Center for Science Education,
|c 1971.
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|a 60 hojas ;
|c 28 cm.--
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0 |
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|a Science education information reports
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| 650 |
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|a CIENCIA
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| 949 |
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|a --YV
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| 916 |
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|a Registros del LS-2000
|