@article{1968, title={INFORME GENERAL SOBRE: ""TRAVIESAS PARA VIAS FERREAS"".}, volume={19}, url={http://www.hormigonyacero.com/index.php/ache/article/view/1491}, number={88}, journal={Hormigón y Acero}, author={, Ager, J. W. A.}, year={1968}, month={ene.} }