population map of central Oklahoma for 1920.
Publisher: American Geographical Society
Published: 1930
Place of publication: New York
Language: eng
Number of pages: 287
Subjects: Maps -- Symbols; Oklahoma -- Population -- Maps
Notes: "Reprinted from The Geographical review, vol. XX, no. 2."

"An attempt to represent both dispersion and concentration quantitatively and graphically on the same map." Cf. p. 383.