Micronutrientes Mickelson & Luxmoore, 1991. Micronutrients in Agriculture Stevenson & Cole. 1999. Cycles of Soil: Carbon, Nitrogen, Sulfur, Micronutrients.
Understanding Wastewater Treatment Systems Julia Gaskin - Cooperative Extension, Ag Pollution Prevention Program Brian Kiepper - Engineering Outreach Service.
1. Dr. St. Nur Fatimah - Pres Kanker Kaheksia
Understanding Wastewater Treatment Systems
