Barlow, P., Heather, J. F., & Willis, R. (1851). A treatise on the strength of timber, cast and malleable iron, and other materials: with rules for application in architecture: The construction of suspension bridges, railways, &c.: and an appendix on the power of locomotive engines, and the effect of inclined planes and gradients (A new ed.). J. Weale.

Barlow, Peter, et al. A Treatise on the Strength of Timber, Cast and Malleable Iron, and Other Materials: With Rules for Application in Architecture: The Construction of Suspension Bridges, Railways, &c.: And an Appendix on the Power of Locomotive Engines, and the Effect of Inclined Planes and Gradients. A new ed. J. Weale, 1851.