Pernal, Andrew Boleslaw2012-03-132012-03-1319771977Source: Dissertation Abstracts International, Volume: 72-05, Section: A, page: .http://hdl.handle.net/10393/21226http://dx.doi.org/10.20381/ruor-8863Abstract not available.592 p.History, European.Political Science, International Relations.The Polish Commonwealth and Ukraine: Diplomatic relations, 1648-1659Thesis