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090715s1990 dk ||||| eng |
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|a 9233759
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|a Sistema de Bibliotecas de la Universidad de Costa Rica
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|a eng
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| 082 |
0 |
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|a 612.607.27
|b K27d
|2 22
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| 100 |
1 |
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|a Keiding, Niels
|e Autor/a
|4 aut
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1 |
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|a Decline of semen quality during the last 50 years and possible links with environmental chemicals /
|c Niels Keiding
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| 260 |
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|a Copenhagen :
|b Universidad of Copenhagen. Departamento of Biostatistics.,
|c [1997].
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| 300 |
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|a 21 páginas :
|b ilustraciones
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| 490 |
0 |
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|a Research report / Statistical Research Unit, University of Copenhagen,
|x ISSN 0316-945
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| 650 |
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|a SEMEN
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| 650 |
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|a ESTADISTICA
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| 650 |
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|a SUSTANCIAS PELIGROSAS
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| 650 |
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|a PRODUCTOS QUIMICOS
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| 650 |
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|x ASPECTOS AMBIENTALES
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| 650 |
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|a MEDIO AMBIENTE
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| 900 |
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|a 2010 feb
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| 912 |
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|a 01-FEB-2010 - GARRIDO CORDERO, IRINA
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| 917 |
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|a 15-JUL-2009 - BUSTAMANTE MORA, CYNTHIA
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| 949 |
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|a IG -EMQ
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| 916 |
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|a Centro Catalográfico
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