Books with substantial mentioning of Operator 13
Homer Dickens
The Films of Gary Cooper
Secaucus, NJ, 1970
Books with an entry on Operator 13
Larry Langman & David Ebner
Encyclopedia of American Spy Films
New York & London, 1990

Operator 13
United States 1933

Directed by

Cast
Katharine Alexander
Willard Robertson
Marjorie Gateson
Clarence Muse
James A. Marcus
William Henry
Richard Tucker
Theresa Harris
Madame Sul-Te-Wan
Larry Adler
DeWitt Jennings
Si Jenks
Wheeler Oakman
Wilfred Lucas
Samuel S. Hinds
Donald Douglas
James C. Morton
Lee Phelps
Clarence Wilson

More..

Year:1933
Running time:85 minutes
Country:United States
Language:English

Imdb link