BLACK BIRD
BLACK BIRD
Volumes
| Cover | Vocabulary List | Total | Unique | Used Once | New ⓘ | Density ⓘ | |
|---|---|---|---|---|---|---|---|
| Series | 16,256 | 3,812 | 2,113 | 55% | 2.54 | ||
 |
BLACK BIRD １ | 2,604 | 1,213 | 832 | 68% | 1,213 | 2.44 |
 |
BLACK BIRD ２ | 2,658 | 1,287 | 895 | 69% | 627 | 2.49 |
 |
BLACK BIRD ３ | 2,616 | 1,271 | 874 | 68% | 513 | 2.45 |
 |
BLACK BIRD ４ | 2,593 | 1,275 | 890 | 69% | 468 | 2.43 |
 |
BLACK BIRD ５ | 3,145 | 1,498 | 1,018 | 67% | 556 | 2.95 |
 |
BLACK BIRD ６ | 2,640 | 1,393 | 982 | 70% | 435 | 2.47 |