%0 Journal Article %T Basic Problems, Techniques, and Theory of Isopleth Mapping* %A Schmid, Calvin F. %A Maccannell, Earle H. %J Journal of the American Statistical Association %V 50 %N 269 %P 220-239 %@ 1537-274X %D 1955-03-01 %I Taylor & Francis Group %~ DeepDyve