| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Glossary in English, Kiswahili, Kikuyu and Dholuo | 978-0-304-93894-0 (0-304-93894-7) | 1972 | |
| Language in Education in Eastern Africa: Papers | 978-0-19-437001-1 (0-19-437001-1) | 1971 | |
| The IEA Study of Written Composition: International Writing Task and Scoring Scales v. 1 | 978-0-08-036467-4 (0-08-036467-5) | 1988 | etc. · A.C. Purves · R.E. Degenhart |
Cassell · Oxford University Press · Pergamon Press