CONTENT AND RATIO OF GROUPS AND FORMS OF IRON COMPOUNDS IN THE VOLCANIC SOILS OF COSTA RICA. Article Vega O.T. Soviet Soil Science. Vol. 12. 1980. P. 545-553
CONTENT AND RATIO OF GROUPS AND FORMS OF IRON COMPOUNDS IN THE VOLCANIC SOILS OF COSTA-RICA Article VEGA O.T. Soviet Soil Science. Vol. 12. 1980. P. 545-553