Franklin Jarlett
Robert Ryan - A Biography and Critical Filmography
1990                          [Amazon reviews]

James Robert Parish
The Tough Guys (Robert Ryan, pages 530-608)
1976

Harold J. Kennedy
No Pickle, No Performance (Robert Ryan, pages 124-148)
1978

Peter Kranzpiller
Stars der Kinoszene - Band 25: Robert Ryan
(Stars of the Cinema Scene - Vol. 25: Robert Ryan)

Sight and Sound, Summer 1955

Robert Ryan
Current Biography, 1963

J. Stein
Robert Ryan
Films in Review, January 1968

T. Génin
Robert Ryan: Un Héro Américain
Avant-Scène du Cinéma, 1 March 1980

Acts of Birth
Films and Filming, March 1971