V. Birck, L. (1902). Prince Krapotkin. Fields, Factories and Workshops, or Industry combined with agriculture and brain work with. mani.al Avork. London 1901. Sonnenschein & Co. (259 S.). Nationaløkonomisk Tidsskrift, 3. Hentet fra https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/58275