Personal Details Born 1888 Died 1978 Main nationality Norway Profession Botanist Documentation Photo span 1914 Publication The vegetation of the Siberian-Mongolian frontiers (the Sayansk region), 1921 https://archive.org/details/cu31924001742760 Images from this book are https://www.flickr.com/search/?text=The%20vegetation%20of%20the%20Siberian-Mongolian%20frontiers