13
Publications
573
Citations
12
H-Index
1974
Active since
Affiliations
Raymond A. Christopher is an author at United States Geological Survey specializing in natural sciences, evolutionary biology, and engineering.
Top concepts
EngineeringNatural SciencesEvolutionary BiologyBotanyBiologyGeologyEarth ScienceGeographyPaleobotanyPhylogenetics
Publications per year
1974–2009
13
13
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1–5 of 13