APA (7th ed.) Citation

Heldt, P. M. (1942). Torque converters or transmissions: For use with combustion engines in road and rail vehicles, tractors and locomotives; mechanical, hydraulic, electric, pneumatic, differential; stepped and continuously-variable; hand-controlled, automatic and semi-automatic. P. M. Heldt.

Chicago Style (17th ed.) Citation

Heldt, Peter Martin. Torque Converters or Transmissions: For Use with Combustion Engines in Road and Rail Vehicles, Tractors and Locomotives; Mechanical, Hydraulic, Electric, Pneumatic, Differential; Stepped and Continuously-variable; Hand-controlled, Automatic and Semi-automatic. Nyack, N. Y.: P. M. Heldt, 1942.

MLA (9th ed.) Citation

Heldt, Peter Martin. Torque Converters or Transmissions: For Use with Combustion Engines in Road and Rail Vehicles, Tractors and Locomotives; Mechanical, Hydraulic, Electric, Pneumatic, Differential; Stepped and Continuously-variable; Hand-controlled, Automatic and Semi-automatic. P. M. Heldt, 1942.