| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Elements of Commerce: Decimal Pt. 1 | 978-0-304-93521-5 | 1970 | Lancelot Oliphant |
| Elements of Commerce: Decimal Pt. 2 | 978-0-304-93595-6 | 1970 | " |
| Elements of Commerce: Nigerian e Pt. 1 | 978-0-304-29284-4 | 1973 | " |
| Elements of Commerce: Nigerian e Pt. 2 | 978-0-304-29291-2 | 1974 | " |
| Elements of Commerce: Pt. 1 | 978-0-304-29265-3 | 1973 | " |
| Elements of Commerce: Pt. 2 | 978-0-304-29328-5 | 1974 | " |
| English and Commercial Correspondence | 978-0-304-91939-0 | 1964 | |
| English and Commercial Correspondence: Tchrs' | 978-0-304-91940-6 | 1964 | |
| Practical Office Training | 978-0-304-92626-8 | 1963 | |