Colonial And Revolutionary Families of Pennsylvania
A brief biography of one of the people instrumental in development of the navigation system is on page 1042.

Congressional Serial Set – 1919
A hearing regarding a proposal to reinstate the navigation system, including a brief history of the original system, begins on page 10.

Henry Clay Frick: The Life of the Perfect Capitalist
The roles of the Mononghahela and Youghiogheny navigation systems in promoting the growth of the coal industry near Pittsburg is on page 36.

History of Allegheny County, Pennsylvania, Including its Early Settlement – 1889
A brief history of the navigation system begins on page 87.

History of Pittsburgh and environs – 1922
 A brief history of the navigation system begins on page 166.

History of Westmoreland County, Pennsylvania – 1906 

A biographical sketch of one of the supporters of the navigation system begins on page 45.

Pennsylvania, colonial and federal – 1904
A brief history of the navigation system begins on page 92.

Pennsylvania Newspaper Archive

A set of historical articles making reference to the navigation system.

The American Steel Industry, 1850-1970: A Geographical Interpretation
A brief history of the navigation system is on page 37.

Water Resources Inventory Report – 1917
A brief history is on page 44.

Wealth, Waste, and Alienation: Growth and Decline in the Connellsville Coke Industry
A brief history is on page 23.

Western Pennsylvania historical magazine – 1919
A brief history of the navigation system begins on page 122.

Youghiogheny River History

Includes a brief history of the navigation system.