|
United States Delaware And Hudson Canal : Vogel, Robert M.
|
1971
|
1
|
|
United States Delmarva Peninsula : Pendleton, Elizabeth A.,
|
2015
|
1
|
|
United States Denver Basin : Bauch, Nancy J.,
|
2014
|
1
|
|
United States Department Of Defense Education Activity : Saavedra, Anna Rosefsky,
|
2012
|
1
|