HarperCollins · Oxford University Press
| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Caribbean Race Relations: A Study of Two Variants | Paperback | 978-0-19-501358-0 | 1971 |
| Caribbean Race Relations: A Study of Two Variants | Hardcover | 978-0-19-218164-0 | 1967 |
| Slavery and race relations in the Americas;: Comparative notes on their nature and nexus | Paperback | 978-0-06-131710-1 | 1973 |
| Slavery and Race Relations in the Americas: Comparative Notes on their Nature and Nexus | Hardcover | 978-0-06-136067-1 | 1973 |