@article{87fb18b6-9dfb-4e9e-8a90-adddec256d44,
author = {Katarzyna Guczalska},
title = {Wprowadzenie},
journal = {Principia},
volume = {2009},
number = {Tom 51-52},
year = {2009},
issn = {0867-5392},
pages = {5-9},keywords = {},
abstract = {},
doi = {},
url = {https://ejournals.eu/czasopismo/principia/artykul/wprowadzenie-24}
}