2018
The Honor Society of Agriculture Gamma Sigma Delta, Nebraska Chapter, History, May 25, 1918-2018
2016
Constitution and Bylaws of the Nebraska Chapter of Gamma Sigma Delta, the Honor Society of Agriculture (2016), Nebraska Chapter of the Honor Society of Agriculture, Gamma Sigma Delta
2009
Constitution and Bylaws of the Nebraska Chapter of Gamma Sigma Delta, the Honor Society of Agriculture, Nebraska Chapter of the Honor Society of Agriculture, Gamma Sigma Delta
1993
The Honor Society of Agriculture, GAMMA SIGMA DELTA, Nebraska Chapter History, Diamond Jubilee 1918-1993, Charles H. Adams