Unknown Author
Philip J. Potter
James McDonald
Gudrun Pausewang
Everett B. Woodruff
Gaudencio Zoppetti Júdez
M. M. El-Wakil
Peter Watts
Margery Hilton
John Grant Fuller
Emil Mosonyi
Harry A. Sorensen
United States. Congress. House. Committee on Patents
Dunn, Christopher
George Frederick Gebhardt
Power Engineering Training Systems