LNER Encyclopedia: The Gresley N2 0-6-2T Locomotives
German Steam Turbine Locomotives.
Class “25” Condensing Locomotives on the South African Railways—Design and Operating Experiences
Why did steam locomotives not cool and recycle the steam/water back to the boiler to increase the range, like the primary loop in a power station? - Quora
Why did steam locomotives not have condensers to recycle the spent steam? The thermal efficiency would be a lot higher. - Quora