Milo / Grain Sorghum
Here are a couple of neat old ag bulletins on grain sorghum:
Kafir Corn (pdf) Kansas State Agricultural College; Manhattan; Bulletin No. 93; March 1900
Milo as a Dry-Land Grain Crop (pdf) USDA Farmers' Bulletin 332; Carleton R. Ball & Arthur H. Leidigh; 1908
How to Use Sorghum Grain (pdf) USDA Farmers' Bulletin 972; Carleton R. Ball & Benton E. Rothgeb; 1918