[1]
Ruiz de Gauna, Ángel 1966. Determination of cement proportioning of mortars and set concretes, in cases where the usual methods for this determination are not applicable. Materiales de Construcción. 16, 121 (Mar. 1966), 41–54. DOI:https://doi.org/10.3989/mc.1966.v16.i121.1720.