1648-1649 1648-1657 biography bohdan cossack-polishwar cossacksinliterature ethnicrelations gezerottaḥve-tat hetmans history historyandcriticism inliteraturekhmelʹnyt͡sʹkyĭ jewishliterature jews khmelʹnyt͡sʹkyĭ literatureandthewar persecutions poland slavicliterature ukraine warsaw zaporozhiansinliterature