Consejos Técnicos industria suiza cemento S investigaciones. On concrete quality control. The special situation and the function of quality checks on hardened concrete. Mater. constr. [Internet]. 1969Mar.31 [cited 2024Apr.30];19(133):77-9. Available from: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1602