C. E. Keefer
- Back River Sewage Works, Baltimore, MD. Dans: Transactions of the American Society of Civil Engineers, v. 110, n. 1 ( 1945). (1945):
- Improvements at the Back River Sewage Works, Baltimore, MD. Dans: Transactions of the American Society of Civil Engineers, v. 116, n. 1 ( 1951). (1951):