1715–1725
United States Geological Survey, 1935
Ailsa Mellon Bruce Fund, 1643
United States Geological Survey, 1938
Ailsa Mellon Bruce Fund, 1490
Ailsa Mellon Bruce Fund, 1974
C.G. Boerner LLC, 1615
United States Geological Survey, 1936
United States Geological Survey, 1937
United States Geological Survey, 1940