Name Info Provider Link
subscription/membership/fee required Atypon https://journals.sagepub.com/doi/10.2466/pr0.1998.82.3c.1282?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Smokeless Tobacco free resource MedlinePlus Health Information https://medlineplus.gov/smokelesstobacco.html