@article{Christiansen_1980, title={W.O. Roberts & H. Lansford: The Climate Mandate. Freeman and Co., San Francisco 1979, 197 s., ill., 23 cm, E 3.30.}, volume={80}, url={https://tidsskrift.dk/geografisktidsskrift/article/view/45325}, journal={Geografisk Tidsskrift}, author={Christiansen, Sofus}, year={1980}, month={jan.} }