http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a teacher's guide to interference and other problems
xv, 265 p.; ill.; 24 cm. + 1 sound cassette (ca. 84 min. : analog)
[edited by] Michael Swan and Bernard Smith
Cambridge handbooks for language teachers