http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (vii, 123 pages): color illustrations, text file, PDF.
http://library.unisel.edu.my/equip-unisel/custom/ebook_catalog/ebook/PocketreferenceforECGsmade easy.pdf