| In a thirteen digit ISBN the combination of 978 is used as a... | |||
| Votes | Ratio | ||
| Group or country identifier |
 |
12 | 34% |
| Publisher identifier |
 |
1 | 3% |
| Title identifier |
 |
1 | 3% |
| Check digit |
 |
1 | 3% |
| Prefix |
 |
16 | 46% |
| None of the above |
 |
4 | 11% |
| 35 votes total | |||