Kowalewska Marta, Kowalewski Jerzy. Co nas łączy. Część 2.1

Krakow: Drukarnia. Zakład usług poligraficznych, 2010. — 50 p.This textbook is an excellent tool for those learning Polish, level B1\B2. It will be especially useful for students and pupils from Ukraine, Russia, Kazakhstan since all the material contained in this book was collected and analyzed over the years by the authors - a married couple - who taught their language in these countries and proceeded from the comparative foundations of these Slavic languages. The exercises point out common mistakes made by Russian- and Ukrainian-speaking students.