Drawing
Arboretum Landscape Teaching Aid Series: A River Emerged From Under A Glacier1940 – 1960
Watts, May Theilgaard
Drawing
Forest Nature Trail Guide, page 9 illustrations and layout with preliminary sketches1946
Watts, May Theilgaard
Photographic image
Gravel pit with wagons and horses on top of Yackley Hill along Butterfield Road1916
Photographic image
Hemlock Hill overlooking gravel pit
Map
Topographical Map of Gravel Pit on the Thoman Farm - Estate of Joy Morton near Glen Ellyn IllinoisOctober 10 – November 20 1940
Steinbrecher, Harold F.
Map
Topographical Map of Gravel Pit on the Thoman Farm - Estate of Joy Morton near Glen Ellyn Illinois [with markings]]October 10 – November 20 1940
Steinbrecher, Harold F.