Waring, G. E. (1885). The drainage question in Philadelphia: A public lecture delivered June 12, 1885, at the hall of the College of Physicians of Philadelphia, by invitation of the Committee on Hygiene of the County Medical Society. [Philadelphia.

Waring, George E. The Drainage Question in Philadelphia: A Public Lecture Delivered June 12, 1885, At the Hall of the College of Physicians of Philadelphia, By Invitation of the Committee On Hygiene of the County Medical Society. [Philadelphia, 1885.

Waring, George E. The Drainage Question in Philadelphia: A Public Lecture Delivered June 12, 1885, At the Hall of the College of Physicians of Philadelphia, By Invitation of the Committee On Hygiene of the County Medical Society. [Philadelphia, 1885.