The link below is to access The depiction of Transylvania in Roumanian historical atlases published 1920-2000 “Erdély történetének bemutatása 1920 és 2000 között kiadott román történelmi atlaszokban”:
https://www.transindex.ro/images/__leo/cikkek/cikkek_31709.pdf
(the English version of the text is to be found by scrolling down)
The same text is to be found here with the event described in detail at
http://epa.oszk.hu/00000/00036/00074/pdf/143-170.pdf
(in Hungarian only)