MARC+Resources

MARC Resurces
500 General Notes http://www.loc.gov/marc/bibliographic/bd500.html

505 General Contents Note http://www.loc.gov/marc/bibliographic/bd505.html

520 Summary, Etc. http://www.loc.gov/marc/bibliographic/bd520.html

856 Electronic Location and Access http://www.loc.gov/marc/bibliographic/bd856.html