@article{Chr. Johansen_1974, title={Roderick Floud: An Introduction to Quantitative Methods for Historians. London. Methuen & Co., Ltd., 1973. 220 s.}, volume={13}, url={https://tidsskrift.dk/historisktidsskrift/article/view/51564}, journal={Historisk Tidsskrift}, author={Chr. Johansen, Hans}, year={1974}, month={jan.} }