Directorios

Enlace: http://collections.ic.gc.ca/soilandwater/

Descripción: Canada's Digital Collections. Government of Canada.
«Land and water are essential resources for life on planet Earth. Over the last century, increases in soil erosion, pollution and desertification have put those precious resources at risk. This has contributed to scarce harvests and has compromised the quality of life for people on the Prairies.»