1. “New Trends in Solids Pipelines”;CONDOLIOS;Chemical Engineering,1967
2. “Pipeline Coal Transportation”;DAUBER;Coal Age,1963
3. “Long-distance Fluids-Solids Pipeline Transportation Follows Logical Pattern”;BENDER;Power,1963
4. “Changes Brewing for Transporting Coal-Energy”;BENDER;Power,1963
5. “Pipelines Show Good Potential for Long-distance Transporting of Solids”;COSTANTINI;Mining Engineering,1961