7. Soil Map, Dover Sheet, Delaware.

1903

Ayrs, O.L.

1:63k

N & S Murderkill.

1868

Beers, D. G.

1:63k

Little Creek, Dover (hundreds)

1868

Beers, D. G.

1:63k

Bowers

1934

1:48k

Wyoming

1926

1:48k

Wyoming

1930

1:63k

Bowers

1936

1:63k

Bowers

1936

1:63k

Wyoming

1931

1:63k

Bowers

1936

1:63k