I put the last of my birch bark on the fire and fanned it into life.
We found that birch bark could serve as paper.
Nomadic hunting nationalities in the north of China, such as Oroqen, Ewenki, Hezhen, all have a long history in using birch bark.
Study of extraction of birch bark (EBB) on immune inhibition tumor effect in bearing tumor mice
In Finland purists insist that only birch bark should be added.
