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##' City data in the United Kingdom
##'
##' Longitude and lattitude for the 20 towns in England and Wales studied by
##' He et al (2010).
##'
##' @name he10coordinates
##' @aliases he10coordinates
##' @rdname he10coordinates
##' @family datasets he10
##' @return a \sQuote{data.frame} of longitude and lattitude for each town.
##'
##' @references
##'
##' \he2010
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