Ndungu ,Ruth . Foundation Mathematics Learners Book Grade 7 ; The Jono Kenyatta Foundation. - 1st edition. - Nairobi : The Jomo Kenyatta Foundation . 2022 . - iii , 229 p . ; col.illustrations . 17.5 cm . ISBN: 978-9966-51-241-3 Dewey Class. No.: 510