G. Alward

发表

Ted C. Schroeder, John C. Leatherman, Dustin L. Pendell, 2007, Journal of Agricultural and Applied Economics.

Sarah McCaffrey, Brian Kent, David E. Calkin, 2003 .

Douglas C. Olson, G. Alward, Gregory S. Alward, 2006 .

C. J. Palmer, C. Palmer, G. S. Alward, 1983 .