@article{Herreno Núñez_1968, title={Concrete proportioning}, volume={18}, url={https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1618}, DOI={10.3989/mc.1968.v18.i131.1618}, abstractNote={Not available}, number={131}, journal={Materiales de Construcción}, author={Herreno Núñez, E.}, year={1968}, month={Sep.}, pages={59–64} }