U.S. Fish and Wildlife Service, Environmental Management Technical Center,
Vegetation workshop, aerial photography interpretation [microform]
Environmental Management Program, Long Term Resource Monitoring Program, upper Mississippi River system
Aerial photography interpretation
Owens, Thomas W.
U.S. Fish and Wildlife Service.
Long Term Resource Monitoring Program (Environmental Management Program)
Environmental Management Technical Center (U.S.)
[by Thomas W. Owens].
Vegetation workshop, aerial photography interpretation [microform]