- Reference Guide For Minerals. Includes definitions and other information for vitamins, minerals, amino acids, herbs and other important nutrients. Great for research.www.realtime.net/anr/minerals.html
- Copper forms part of your daily diet, and plays a certain role in maintaining your health, vitality and wellbeing.www.anyvitamins.com/copper-info.htm
- Information about copper.www.satisfied-mind.com/drugstore/copper.htm
- Copper in diet...www.nlm.nih.gov/medlineplus/ency/article/002419.htm