Developed by the University of Wisconsin Digital Collections group, the Ecology and Natural Resources Collection Web site brings together writings about research in ecology and natural resources conducted by University of Wisconsin faculty and staff, along with unique or valuable titles in these fields from the holdings of the University of Wisconsin Libraries. While titles will continue to be added in the future to this archive, the archive currently contains several important works, including Soils of Wisconsin, authored by Francis Doan Hole. The archive contains some other amazing material, such as 188 images from the papers of the late naturalist Aldo Leopold, author of A Sand County Almanac. Here visitors can peruse (and search) various images, including several pages of his hand-written journals, photographs of him out and about around Wisconsin, and hand-drawn maps of the places that were dear to him. Finally, users can look through the Wisconsin Land Economic Inventory maps (often called the Bordner Survey after its director, John Bordner), which offer a portrait of the Wisconsin landscape during the 1930s and 1940s.