Prosvitnja pracja halyčan sered vijsʹkovopolonenych ukraïnciv rosijsʹkoï armiï u taborach Avstro-Uhorščyny ta Nimeččyny (1914-1918) = The Galicians' educational work among the Ukrainian prisoners of the Russian army in the camps of Austria-Hungary and Germany (1914-1918) - Pater, Ivan Hryhorovyč 1948- (2017)