well-formed | ||
valid hyphenation | ||
ISBN-10 | 954-27-0151-9 | 9542701519 |
ISBN-13 | 978-954-27-0151-4 | 9789542701514 |
Agency | Bulgaria |
well-formed | ||
valid hyphenation | ||
ISBN-10 | 1-78110-539-1 | 1781105391 |
ISBN-13 | 978-1-78110-539-9 | 9781781105399 |
Agency | English language |