@article {Heath:1964-12-01T00:00:00:0008-7041:33,
	author = "Heath, Willis R.",
	title = "Technical Problems on Thematic Mapping",
	journal = "Cartographic Journal, The",
	volume = "1",
	number = "2",
	year = "1964-12-01T00:00:00",
	abstract = "This careful analysis of the nature of thematic mapping, and a demonstration of an unusual technical process, is contributed by a staff member of the Department of Geography, University of Washington, Seattle.",
	pages = "33-36",
	url = "http://www.ingentaconnect.com/content/maney/caj/1964/00000001/00000002/art00008",
	doi = "doi:10.1179/000870464786937533"
}