Przewodnik Przyrodniczy i Fotograficzny Krzysztof Żarkowski

74.20.Z - Photographic activities

72.19.Z - Other research and experimental development on natural sciences and engineering

74.90.Z - Other professional, scientific and technical activities not elsewhere classified

82.30.Z - Organisation of conventions and trade shows

85.52.Z - Out-of-school forms of cultural education

85.59.B - Other out-of-school forms of education, not elsewhere classified