Salvadori, Mario G. and Robert A. Heller. Structure in Architecture: The Building of Buildings. 2nd ed. Prentice-Hall International Series in Architecture. Englewood Cliffs, New Jersey: Prentice-Hall, 1975.

Salvadori, Mario G. and Robert A. Heller. Structure in Architecture: The Building of Buildings. 2nd ed. Prentice-Hall International Series in Architecture. Englewood Cliffs, New Jersey: Prentice-Hall, 1975.