well-formed | ||
valid hyphenation | ||
ISBN-10 | 954-446-468-9 | 9544464689 |
ISBN-13 | 978-954-446-468-4 | 9789544464684 |
Agency | Bulgaria |
well-formed | ||
valid hyphenation | ||
ISBN-10 | 954-446-467-0 | 9544464670 |
ISBN-13 | 978-954-446-467-7 | 9789544464677 |
Agency | Bulgaria |