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@article{10_14708_dm_v11i01_6850, author = {. Redakcja}, title = {Przedmowa}, journal = {Didactica Mathematicae}, pages = { 5--8}, publisher = {mathdoc}, volume = {11}, number = {01}, year = {1989}, doi = {10.14708/dm.v11i01.6850}, language = {pl}, url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v11i01.6850/} }
. Redakcja. Przedmowa. Didactica Mathematicae, Tome 11 (1989) no. 01, pp. 5-8. doi : 10.14708/dm.v11i01.6850. http://geodesic.mathdoc.fr/articles/10.14708/dm.v11i01.6850/
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