| 1. |  | High altitude aerial photograph over flooded Heart River in Township 139N, Range 81W, Section 28, Morton County, N.D. | Aerial photographs; Floods; Rivers; Railroad tracks; Railroad bridges; Reformatories; | High altitude aerial photograph over Heart River at flood stage in Township 139N, Range 81W, Section 28, Morton County, N.D. The Northern Pacific Railroad is visible running across the image, showing railroad... |
