MedlinePlus: Calcium
- Lists links to many articles on calcium and our health from government and health agencies.
- http://www.nlm.nih.gov/medlineplus/calcium.html

Vegetarian Society of the United Kingdom: Calcium
- A complete reference on calcium for the general public.
- http://www.vegsoc.org/info/calcium.html

Keep Kids Healthy: Calcium Requirements
- Article about the nutritional requirements and dietary sources for this mineral.
- http://www.keepkidshealthy.com/nutrition/calcium_requirements.html

Osteoporosis Canada: Calcium - An Essential Element for Bone Health
- Tells why we need calcium in our diets, gives daily calcium requirements for different age groups, talks about the effects of salt and caffeine on our calcium requirement, and gives the calcium content of some common foods.
- http://www.osteoporosis.ca/english/About%20Osteoporosis/Nutrition/

Ohio State University Extension Fact Sheet: Calcium
- Fact sheet explaining which foods are a good source of this mineral used for building bones and teeth, and in maintaining bone strength.
- http://ohioline.osu.edu/hyg-fact/5000/5557.html