Jennings, W. N. (1889). Through the Conemaugh valley: A series of photographs showing the destructive effect of the flood of May 31, 1889, along the line of the Pennsylvania railroad. Philadelphia: Jennings.

Jennings, William N. Through the Conemaugh Valley: A Series of Photographs Showing the Destructive Effect of the Flood of May 31, 1889, Along the Line of the Pennsylvania Railroad. Philadelphia: Jennings, 1889.

Jennings, William N. Through the Conemaugh Valley: A Series of Photographs Showing the Destructive Effect of the Flood of May 31, 1889, Along the Line of the Pennsylvania Railroad. Philadelphia: Jennings, 1889.