G. D. Somerville

Somerville, G. D., & Sowell, R. S. (1992). Object-oriented systems for machinery management. Paper (American Society of Agricultural Engineers), (92-7033), 16.

Somerville, G. D., & Sowell, R. S. (1992). Total farm machinery costs program for MS-Windows. Paper (American Society of Agricultural Engineers), (92-3043), 15.