https://shkola.obozrevatel.com/ukr/gdz/7klass/vsemirnaya_istoriya/schupak-20202/rozdil-pyatij-kraini-tsentralnoi-i-shidnoi-evropi-v-hhv-st/28-praktichna-robota-polske-korolivstvo-velike-knyazivstvo-litovske/