1. Reclamation and Reuse of Lime in Water Softening;Aultman;Jour. A.W.W.A.,1939
2. Review of Lime-Soda Softening;Hoover;Jour. A.W.W.A.,1937
3. Lime Recovery From Water Softening Sludges;Sowden;Jour. A.W.W.A.,1941
4. Disposal of Sludge at Water Purification and Softening Works of the Mahoning Valley Sanitary District;Dittoe;Jour. A.W.W.A.,1933
5. Allen , Edward M. Purification of Calcium Carbonate 1942