From: NLM Catalog
NLM Catalog Help [Internet].
Bethesda (MD): National Center for Biotechnology Information (US); 2007-.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
| Examples: |
|---|
| " http://www.medinfo.ufl.edu/other/pcnews/ " |
| " http://www.nhgri.nih.gov/educationkit/ " |
| " https://www.appi.org/book.cfm?id=62025 " |