http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a self-study reference and practice book for elementary students of English : with answers
Using clear examples and easy-to-follow exercises, this new, full-colour edition of the best-selling 'Essential grammar in use' makes learning easy, covering all the areas of grammar that an elementary-level student needs.--Back cover.