History - questions and answers : Grade 9 - Haputhanthri, Kumudini Dias; Perera, Lakshmi (Nugegoda : Sarasavi Publishers, 2019)
Keywords: World history - Problems, exercises, etc; World history - Grade 9 - Problems, exercises, etc; Sri Lanka - History - Problems, exercise, etc; Sri Lanka - History - Grade 9 - Problems,exercises, etc