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Spring Wild Flowers of the Forest Floor At The Morton Arboretum: A Key To Identification, page 71944
Watts, May Theilgaard
Drawing
Forest Nature Trail Guide, page 12 illustrations and layout with preliminary sketches1946
Watts, May Theilgaard
Drawing
Evergreen Nature Trail Guide, page 12 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard
Drawing
Arboretum Landscape Teaching Aid Series: Confirmation from Old Maps1940 – 1960
Watts, May Theilgaard
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Arboretum Landscape Teaching Aid Series: Indian Trails and Villages1940 – 1960
Watts, May Theilgaard
Drawing
Spring Wild Flowers of the Forest Floor At The Morton Arboretum: A Key To Identification, page 61944
Watts, May Theilgaard
Drawing
Evergreen Nature Trail Guide, page 13 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard
Drawing
Trees Native To North America But Not To This Region That Can Be Grown HereWatts, May Theilgaard
Drawing
Evergreen Nature Trail Guide, page 14 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard
Drawing
Arboretum Landscape Teaching Aid Series: Know, Know, Know Your Oaks, This Is How They Grow1940 – 1960
Watts, May Theilgaard
Drawing
Forest Nature Trail Guide, page 15 illustrations and layout with preliminary sketches1946
Watts, May Theilgaard
Drawing
Evergreen Nature Trail Guide, page 15 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard