| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Introduction to Agricultural Production, Economics and Farm Management | 978-O-O7-O96585-O (O-O7-O96585-4) | 1971 |
A. R. · A. Robertson · C.A. · C A R · C.J.A. Robertson · C.R. · C. Robertson · Charles A. Lockhart Robertson · Charles A.W. Robertson