Drawing
Evergreen Nature Trail Guide, page 12 illustrations and layout with preliminary sketches1940s
Watts, May Theilgaard
Photographic image
Austrian pine on right with view of Thompson's 2nd homesite (site of first Lisle Post Office)1930 – 1949
Photographic image
Pinus nigra (Austrian Pine), cone, pistillate, immatureMay 30 2007
Hedborn Jr., Edward A.