title: On mental and visual geometry.
authors.affiliation: Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: S J
authors.initials: SJ
authors.lastname: Gould
mesh_terms: D002965:Classification; D049671:History, 18th Century; D006801:Humans; D044469:Racial Groups / Q000145:classification* / Q000266:history*