well-formed | ||
valid hyphenation | ||
ISBN-10 | 954-446-491-3 | 9544464913 |
ISBN-13 | 978-954-446-491-2 | 9789544464912 |
Agency | Bulgaria |
well-formed | ||
valid hyphenation | ||
ISBN-10 | 1-78110-527-8 | 1781105278 |
ISBN-13 | 978-1-78110-527-6 | 9781781105276 |
Agency | English language |