Scale not given. Title supplied. Manuscript; watercolor and ink. Pictorial map. Relief shown pictorially. Shows the yellow River water control system in Henan Province. Hummel gift 1962, no. 9. Available also t More
Scale not given. Cover title. Manuscript, watercolor and ink. Labels pasted on to show distance. Relief shown pictorially. Pictorial map. Shows the Yellow River water control system in Henan Province. Also show More
Scale not given. Cover title. Manuscript, watercolor and ink. Labels pasted on to show distance. Relief shown pictorially. Pictorial map. Shows the Yellow River water control system in Henan Province. Also show More
Scale not given. Cover title. Manuscript, watercolor and ink. Labels pasted on to show distance. Relief shown pictorially. Pictorial map. Shows the Yellow River water control system in Henan Province. Also show More