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Books about Heldner:
The art of Knute Heldner by Knute Heldner (1925)
Wiki information Heldner:
Knute Heldner was a Swedish American artist.
Collette Pope Heldner was an American painter. She was born in Minnesota in 1902. She married Knute Heldner, also a painter, who was her instructor at a school in Minnesota. The two lived and painted in New Orleans, Louisiana from about 1923 onward....