1. Horizontal silo coverings, losses and pressures;McCalmont,1954
2. Design data for above ground horizontal silos;Esmay;Bull. S. Dak. agric. Expt. Sta. No., 660,1958
3. Storage structures for grass silage;Zoerb;Bull. S. Dak. agric. Expt. Sta. No. 477,1959
4. Horizontal silos;Hendrix,1958
5. Results of investigations of lateral wall pressures in bunker silos;Achilles,1969