@incollection{:/content/books/9789210453264s003-c013, author = "United Nations", title = "Internal trade", booktitle = "Statistical Yearbook 1948, First Issue", publisher = "United Nations", year = "1950", pages = "308-309", url = "https://www.un-ilibrary.org/content/books/9789210453264s003-c013" }