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#' Word countries ISO code.
#'
#' \itemize{
#' \item country_code Two-digits country codes
#' \item description Description of the location
#' \item sub_code ISO3166-2 country codes
#' }
#'
#' @docType data
#' @keywords datasets
#' @name countries
#' @usage data("countries")
#' @format A data frame with 117293 rows and 3 variables
#' @references \url{https://www.unece.org/cefact/codesfortrade/codes_index.html}
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