@article{Rockwood_1951, title={Little used tools for concrete research}, volume={1}, url={https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2785}, DOI={10.3989/mc.1951.v01.i020.2785}, abstractNote={<p>No disponible</p>}, number={020}, journal={Materiales de Construcción}, author={Rockwood, N.C.}, year={1951}, month={May}, pages={33–33} }