8 treff

Ecosystem management : rare species and significant habitats : proceedings of the 15th annual natural areas conference
Annual Natural Areas Conference
Bok Språk ikke angitt 1990
A checklist of New York State plants
Richard S. Mitchell
Bok Engelsk 1986
Magnoliaceae through Ceratophyllaceae of New York State
Richard S. Mitchell, Ernest O. Beal
Bok Engelsk 1979
Mineral names : what do they mean?
Mitchell, Richard S.
Bok Engelsk 1979
Preliminary lists of rare, endangered and threatened plant species in New York State
Mitchell, Richard S.
Bok Språk ikke angitt 1979
Polygonaceae <Buckwheat family> of New York State
Richard S. Mitchell, J. Kenneth Dean
Bok Engelsk 1978
A flora of the White Mountains, California and Nevada
Robert M. Lloyd and Richard S. Mitchell
Bok Engelsk 1973
Variation in the polygonum amphibium complex and its taxonomic significance
Mitchell, Richard S.
Bok Engelsk 1968