"Ščyryj pryvit z XI Olimpijsʹkych vsesvitnych zmahanʹ v Berlini !" z nevidomoho lystuvannja Ivana Bobersʹkoho ta kerivnyctva ukraïnsʹkoho tovarystva "Sokil-Batʹko" = "Sincere greetings from the XI Olympic World Competitions in Berlin !" : from an unknown correspondence of Ivan Boberskiy and the leadership of the Ukrainian Ssociety "Sokil-Batko" - Sova, Andrij Olehovyč 1980- (2017)