Inventors in industry /
Radford, Ruby L.
Inventors in industry / Ruby L. Radford ; ill. by Jim Fox. - New York : Julian Messner, c1969. - 96 p. : ill.
0671321811
Inventors--United States.
Inventors in industry / Ruby L. Radford ; ill. by Jim Fox. - New York : Julian Messner, c1969. - 96 p. : ill.
0671321811
Inventors--United States.