well-formed | ||
valid hyphenation | ||
ISBN-10 | 954-446-930-3 | 9544469303 |
ISBN-13 | 978-954-446-930-6 | 9789544469306 |
Agency | Bulgaria |
well-formed | ||
valid hyphenation | ||
ISBN-10 | 1-78110-538-3 | 1781105383 |
ISBN-13 | 978-1-78110-538-2 | 9781781105382 |
Agency | English language |