- Author: Russell Roberts, Richard Youmans
- Language: English
- Year: 1993
- Author: John M. Mulder, F. Morgan Roberts, Richard J. Mouw
- Language: English
- Year: 2015
Cut & Paste
pdf
- Author: Caroline Roberts Richard Brereton
- Language: English
- Year: 2011
- Author: Roberts Richard
- Language: English
- Year: 2013
- Author: Peter Senge, Art Kleiner, Charlotte Roberts, Richard B. Ross, Bryan J. Smith
- Language: English
- Year: 1994
- Author: Jeremy A. Roberts Richard Hooley (auth.)
- Language: English
- Year: 1988
- Author: Arnold Winston, Laura Weiss Roberts, Richard N. Rosenthal
- Language: English
- Year: 2020
- Author: Kreuz Roger J., Roberts Richard
- Language: English
- Year: 2016
- Author: Kreuz Roger J., Roberts Richard Miller
- Language: English
- Year: 2015
- Author: Kreuz Roger J., Roberts Richard Miller
- Language: English
- Year: 2015