Szukana fraza: [Abstract = "Following Bujak, many field studies on social issues were conducted in Poland. These were inspired not only by Le Play but also by German researchers gathered around \"Verein für Socialpolitik\". The priest Aleksander Wóycicki was the last one whose research was based strictly on Le Play`s monographic method \(\"Robotnik polski w życiu rodzinnym 1918\-1920\"\)."]