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Patterns of geographic variation in Florida snakes
Geographic variation in slash pine (Pinus elliottii Engelm.)
1987 census of agriculture Volume 1 Geographic area series
Geographic distribution of the pines of the world
Geographic variation in the Central American colubrine snake, Ninia sebae
Redescription and geographic variation of Monopeltis guentheri Boulenger (Amphisbaenia, Reptilia)
A morphometric analysis of geographic variation within Sorex monticolus (Insectivora:Soricidae)
Second systematic census of Australian plants, with chronologic, literary and geographic annotations
Geographic variation among brown and grizzly bears (Ursus arctos) in North America
Systematic census of Australian plants, b with chronologic, literary and geographic annotations