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María de las Mercedes Yfran Elvira

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Indicatori biologici della qualità dell'acqua: Nelle fonti d'acqua dei piccoli agricoltori (Italian Edition)
Biologische Indikatoren für die Wasserqualität: In Wasserquellen von Kleinbauern (German Edition)
Indicadores Biológicos de Calidad de Agua: Dans les sources d'eau des petits exploitants agricoles (French Edition)
Indicadores biológicos da qualidade da água: Nas fontes de água dos pequenos agricultores (Portuguese Edition)
Biological Indicators of Water Quality: In water sources of small agricultural and livestock producers
Indicadores Biológicos de Calidad de Agua: En fuentes de agua de pequeños productores agropecuarios (Spanish Edition)