- Author: Peter D. Easton Robert F. Halsey Mary Lea McAnally AI L. Hartgraves Wayne J. Morse
- Language: English
- Year: 2018
- Author: Patrick E. Hopkins, Robert F. Halsey
- Language: English
- Year: 2019
- Author: Peter D. Easton, John J. Wild, Robert F. Halsey, Mary Lea McAnally
- Language: English
- Year: 2015
- Author: John J. Wild K.R. Subramanyam Robert F. Halsey
- Language: Spanish
- Year: 2007
- Author: John J. Wild, K. R. Subramanyam, Robert F. Halsey
- Language: Spanish
- Year: 2007
- Author: John J Wild K. R. Subramanyam Robert F. Halsey
- Language: English
- Year: 2005