Aitäh uscha! (I belive "aitäh" means "thanks" on estonian)

That was exactly what I was looking for. Now i'm just going to find depictions/stories about the ERNA's activities (other than Mihkel Simmo's diarys & Ülo Jõgi's book).

Is there anyone on this forum that's know where I can find any info about the ERNA-group that was active in the summer 1941? I have a bad translation of Mihkel Simmo's diary from 1941 and know that the national archives of Estonia (Rahvusarhiiv) has som material ("13.5. Leitnant Helmar Lossmani...