Helkiær Jensen, Ruth. “S. R. Eyre: World Vegetation Types. A. B. Mountjoy (ed): Developing the Underdeveloped Countries”. Geografisk Tidsskrift - Danish Journal of Geography 74 (January 1, 1975). Accessed August 31, 2026. https://tidsskrift.dk/geografisktidsskrift/article/view/45565.