Robert B. Keller
发表
William A. Beckman,
Ward O. Winer,
John A. Clark,
1961
.
Robert B. Keller,
Jeffrey N. Katz,
Benjamin C. Amick,
2000,
Journal of Occupational Rehabilitation.
Benjamin Littenberg,
Robert B. Keller,
John E. Wennberg,
1994
.
Laura Punnett,
Robert B. Keller,
Jeffrey N. Katz,
1997
.