@article{Chinchilla_1962, title={Tractor con control automatico}, volume={12}, url={https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1836}, DOI={10.3989/mc.1962.v12.i107.1836}, abstractNote={Not available}, number={107}, journal={Materiales de Construcción}, author={Chinchilla, M.}, year={1962}, month={Sep.}, pages={47} }