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| LEADER |
00767nam a22002171a 4500 |
| 001 |
UNA01000095158 |
| 005 |
20120328193642.0 |
| 008 |
080728s1996 000 0 eng d |
| 040 |
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|a Sistema de Bibliotecas de la Universidad Nacional de Costa Rica
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| 082 |
0 |
4 |
|a 631.45
|b G726p
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| 100 |
1 |
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|a Graaff, Jan de,
|d 1948-
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| 245 |
1 |
4 |
|a The price of soil erosion :
|b an economic evaluation of soil conservation and watershed development /
|c Jan de Graaff,
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| 260 |
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|a [Netherlands] :
|b s.n. ,
|c 1996
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| 300 |
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|a 300 p. ;
|c 24 cm.
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| 502 |
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|a Tesis (Doctorado) --
|b Wageningen Agricultural University
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| 650 |
0 |
4 |
|a EROSION
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| 650 |
0 |
4 |
|a EROSION
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| 650 |
0 |
4 |
|a DETERIORO DEL SUELO
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| 650 |
0 |
4 |
|a CONSERVACION DE SUELOS
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| 650 |
0 |
4 |
|a CONSERVACION DE AGUAS
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| 650 |
0 |
4 |
|a PAISES EN DESARROLLO
|