http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Some issues also available on 35 mm. microfilm.
Readers' guide abstracts (microform) 0886-0092
Readers' guide to periodical literature 0034-0464
Cumulative index to nursing & allied health literature 0146-5554
International aerospace abstracts 0020-5842
Issued also in French, Spanish, and Arabic eds.