@article{0390271e-640b-4e26-83cf-72bd23529713,
author = {},
title = {Od redakcji: Już pięćdziesiąty tom Principiów},
journal = {Principia},
volume = {2008},
number = {Tom 50},
year = {2008},
issn = {0867-5392},
pages = {5-7},keywords = {},
abstract = {},
doi = {},
url = {https://ejournals.eu/czasopismo/principia/artykul/od-redakcji-juz-piecdziesiaty-tom-principiow}
}