• Event: The Most Beautiful Books of Slovakia 2020
• Prize: Award of the Ministry of Culture of the Slovak Republic for the Book Illustrations

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• Authors: text: Erik Ondrejička, illustrator: Karol Felix, art designer: Mária Rojko
• Publisher: Ikar
• Publication year: 2020
• Printing house: Tlačiarne BB
• Size: 140 s.; fareb. ilustr.; 24 x 18cm
• ISBN: 978-80-551-7501-0

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• Collection name: Collection of the Most Beautiful Books of Slovakia
• Institute: BIBIANA, International House of Art for Children
• Electronic source: On-line catalogue of the Library of BIBIANA, https://www.kis3g.sk/cgi-bin/gw_48_1_3/chameleon?skin=bin
• Subject: book culture; book illustration; book design; art competitions; prizes
• Format ISBD(M): Za jedinou vetou = / Erik Ondrejička ; illustrator: Karol Felix, art designer: Mária Rojko - Bratislava : Ikar , 2020. - 140 s.; fareb. ilustr.; 24 x 18cm ISBN 978-80-551-7501-0