Home › Authors › Serah Mwangi 👤 Serah Mwangi 3 books Books by Serah Mwangi Language planning for developm Language planning for development in Africa 2006 Prepositions in Kenyan English Prepositions in Kenyan English 2003 Prepositions in Kenyan English Prepositions in Kenyan English: a corpus based study in lexicogrammatical variation