Salvadori, Mario, 1907-1997 Structure in architecture : : the building of buildings / [electronic resource] / Mario Salvadori, in collaboration with Robert Heller.. — 2d ed.. — Englewood Cliffs, N.J. : : Prentice-Hall,, [1975]. — 414 p. : : ill. ; 24 cm. - Prentice-Hall international series in architecture.