August Sander was a German portrait and documentary photographer. Sander's first book Face of our Time (German: Antlitz der Zeit) was published in 1929. Sander has been described as "the most important German portrait photographer of the early twentieth century."[1]
https://www.tate.org.uk/art/artists/august-sander-5319/lists/five-things-know-august-sander
https://aperture.org/blog/august-sander/
http://100photos.time.com/photos/august-sander-bricklayer
https://www.tate.org.uk/art/artists/august-sander-5319/lists/five-things-know-august-sander
https://aperture.org/blog/august-sander/
http://100photos.time.com/photos/august-sander-bricklayer