@article{BREUNING MADSEN_1978, title={POSSIBILITIES AND LIMITATIONS OF BLACK-AND-WHITE AERIAL PHOTOGRAPHS IN SOIL SURVEYING}, volume={77}, url={https://tidsskrift.dk/geografisktidsskrift/article/view/45444}, journal={Geografisk Tidsskrift}, author={BREUNING MADSEN, HENRIK}, year={1978}, month={jan.} }