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ceskatelevize.cz
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"TV – szombat IV.6" [TV – Saturday IV.6]. Rádió- és Televízió-újság (in Hungarian). 1 April 1968. p. 13. Archived from the original on 3 January 2023. Retrieved 3 January 2023 – via MTVA Archívum.
"Sabato | TV | 6 aprile" [Saturday | TV | 6 April]. Radiocorriere TV (in Italian). Vol. 45, no. 14. 31 March – 6 April 1968. pp. 98–99. Retrieved 23 January 2023.
"TV – samedi 6 avril" [TV – Saturday 6 April]. Radio TV – Je vois tout (in French). No. 14. Lausanne, Switzerland. 4 April 1968. pp. 78–79. Retrieved 3 January 2023 – via Scriptorium.
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René-Roger (9 April 1968). "La chanson espagnole triomphe devant 200 millions de spectateurs" [Spanish song triumphs in front of 200 million spectators]. La Croix (in French). p. 3. ISSN0242-6056. OCLC1367977519.