Tsisika, Eunice (et al) Our World Social Studies / Learner's Book Grade 4/ cover title - 1st. ed. - Nairobi : One Planet Publishing & Media Services Ltd. , 2019. - 107p. : col. ill. ; - 2019 ISBN: 978 9966 068 95 8 Subjects--Topical Terms: Nairobi : Dewey Class. No.: 300.372