E. D. Hardy
- (1906): Works for the Purification of the Water Supply of Washington, D. C.. Dans: Transactions of the American Society of Civil Engineers, v. 57, n. 2 (décembre 1906).
- (1911): Water Purification Plant, Washington, D. C., Results of Operation. Dans: Transactions of the American Society of Civil Engineers, v. 72, n. 2 (juin 1911).
Structurae coopère avec
