Xu, M., & Robinson, A. H. (1970). The fidelity of isopleth maps: An experimental study. University of Minnesota Press.
Chicago-čujuhus (17. p.)Xu, Meiling, juo Arthur Howard Robinson. The Fidelity of Isopleth Maps: An Experimental Study. Minneapolis: University of Minnesota Press, 1970.
MLA-čujuhus (9. p.)Xu, Meiling, juo Arthur Howard Robinson. The Fidelity of Isopleth Maps: An Experimental Study. University of Minnesota Press, 1970.
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