Variants
47640 |
Ishihara‘s tests for colour deficiency, 38 plates edition |
47600 |
Ishihara‘s tests for colour deficiency, 24 plates edition |
47610 |
Ishihara‘s tests for colour deficiency, 14 plates edition |
47620 |
Ishihara‘s design charts for colour deficiency of unlettered persons, 10 plates |