This Essential Resource Contains Two Books In One - The Complete Texts Of The Australian School Oxford Dictionary And The Australian School Oxford Thesaurus.designed To Support Students Throughout Their Secondary Schooling (ages 10 To 16) As They Build Their Writing And Communication Skills, This Authoritative Australian Resource Is Now Completely Revised And Updated.now In A Vibrant And Appealing New Edition, This Combined Dictionary And Thesaurus Is Informed By The Lexicographical Expertise Of The Australian National Dictionary Centre, Providing Australian Students With A Trusted Reference, Packed With Age-appropriate Features, Including:over 20,000 Dictionary Headwords And 10,000 Thesaurus Headwordsdictionary Entries At The Front And Thesaurus Entries At The Backword Origin And Usage Notes, Where Doubt Or Error Is Common.