http://www.wiadomosci24.pl/artykul/gwiazda_betlejemska_czy_planety_betlejemskie_356600.html autor: Heartlight mat. ilustr. http://www.heartlight.org/articles/201512/20151215_hopeoftheworld.html autor: photoree mat. ilustr. http://www.photoree.com/photos/permalink/4096963-71401718@N00 Licencja: CC4.0
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