Christiansen, Sofus. “R. G. Baily: Ecosystem Geography. Berlin, Springer, 1996. Xii, 204 S. ill., L Kort I Lomme. 24 Cm. DEM 59,-. R. G. Baily: Ecoregions - the Ecosystem Geography of the Oceans and Continents. New York, Springer, 1998. Ix, 176 s., ill., 2 Kort I Lomme. 24 Cm. GBP 26,-”. Geografisk Tidsskrift - Danish Journal of Geography 99 (January 1, 1999). Accessed December 5, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/42364.