Author： Tobler Waldo R.
Publisher： Cartography and Geographic Information Society
ISSN： 1545-0465
Source： Cartography and Geographic Information Science, Vol.13, Iss.2, 1986-04, pp. : 117-120
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By Tobler W. R.
Cartography and Geographic Information Science, Vol. 1, Iss. 1, 1974-04 ,pp. :