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Yoga Rathna Babu, Prashanth Devi M. - ISBN: 978-620-7-47668-8
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Hanen Boukhris, Sabrine Jlassi, Hayet Hajjami - ISBN: 978-620-7-47697-8
Vasyl Moshchenok, Peter STOEV, Natalia Lalazarova - ISBN: 978-620-7-47720-3