
Dempsey, George Drysdale Malleable Iron Bridges: Details Of Their Construction, And Summary Of Experiments

Drysdale, Charles Vickery Small Or Large Families: Birth Control From the Moral, Racial and Eugenic Standpoint

Dempsey, George Drysdale Brick Bridges, Sewers, And Culverts: A Series Of Examples Adapted For Application In The Construction Of Roads And Railways, And In Draining Of Towns ... In Working Plans & Sections, With Figured

Dempsey, George Drysdale Iron Applied to Railway Structures: Comprising an Abstract of Results of Experiments Conducted Under the Authority of the Commissioners Appointed by ... Structures. With Practical Notes, and Illus

Drysdale, Charles Robert On the Treatment of Syphilis and Other Diseases Without Mercury: Being a Collection of Evidence to Prove That Mercury Is a Cause of Disease, Not a Remedy

Dempsey, George Drysdale The Practical Railway Engineer: Examples of the Mechanical and Engineering Operations and Structures Combined in the Making of a Railway

Drysdale, Charles Robert The Population Question According to T. R. Malthus and J. S. Mill: Giving the Malthusian Theory of Overpopulation

Drysdale, Charles Vickery Small Or Large Families: Birth Control From The Moral, Racial And Eugenic Standpoint; Volume 25

Drysdale, Charles Vickery Small Or Large Families: Birth Control From The Moral, Racial And Eugenic Standpoint; Volume 25