@article{Sturm_1998, title={M. Doddema-Winsemius, M. van Essen, J. Dekker, De jongen Jaap Kann. Aantekeningen (1914-1918) van de pedagoog Otto Barendsen}, volume={113}, url={https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105359}, DOI={10.18352/bmgn-lchr.4663}, number={1}, journal={BMGN - Low Countries Historical Review}, author={Sturm, J.C.}, year={1998}, month={Jan.}, pages={135–136} }