B. Madsen, Henrik. 1980. “John Ormsbee Simonds: Earthscape. A Manual of Environmental Planning McGraw-Hill Book Company, New York 1978. XII, 340 s., Ill. 31 Cm. DM 71,50”. Geografisk Tidsskrift 80 (januar). https://tidsskrift.dk/geografisktidsskrift/article/view/45288.