@article{tosello_rupp_1943,  title={Um nível para o lavrador},  volume={3},  ISSN={0006-8705},  url={https://doi.org/10.1590/S0006-87051943000900002},  DOI={10.1590/S0006-87051943000900002},  number={9},  journal={Bragantia},  publisher={Instituto Agronômico de Campinas},  author={Tosello, R. N. and Rupp, L. S.},  year={1943},  month={Sep},  pages={323–332} }