Energy storage, compression, and switching : [proceedings of the International Conference on Energy Storage, Compression, and Switching held in Asti-Torino, Italy, November 5-7, 1974] / jt. ed. by W. H. Bostick, V. Nardi, O. S. F. Zucker ; sponsored by Istituto Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy, Stevens Institute of Technology, Hoboken, N.J., Consiglio Nazionale delle Ricerche, Roma, Italy.