| Name | Info | Provider | Link |
|---|---|---|---|
| free resource | Atypon | https://ehp.niehs.nih.gov/doi/10.1289/ehp.102-1567276?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed | |
| Minerals | free resource | MedlinePlus Health Information | https://medlineplus.gov/minerals.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/7882931/ | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/7882931 |