978-99918-1
978-99972-0
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 99918-1-242-3 | 9991812423 |
| ISBN-13 | 978-99918-1-242-7 | 9789991812427 |
| Agency | Faroe Islands | |
| Publisher | BFL | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 99972-0-145-0 | 9997201450 |
| ISBN-13 | 978-99972-0-145-4 | 9789997201454 |
| Agency | Faroe Islands | |
| Publisher | BFL | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 99972-0-257-0 | 9997202570 |
| ISBN-13 | 978-99972-0-257-4 | 9789997202574 |
| Agency | Faroe Islands | |
| Publisher | BFL | |