Drawing
Evergreen Nature Trail Guide, page 10 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard
Drawing
Evergreen Nature Trail Guide, page 8 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
Photographic image
Education charts: The Northwoods
Photographic image
Pinus resinosa (Red Pine), cone, mature, leaf, matureAugust 1 2007
Brown, Deborah J. G.