Nystrom, J. W. 1., & Haworth, J. (1874). On supplying Philadelphia with water, from the Schuylkill and Wissahickon without the aid of steam power. Philadelphia: John P. Murphy.

Nystrom, John W. 1824-1885., and James Haworth. On Supplying Philadelphia With Water, From the Schuylkill and Wissahickon Without the Aid of Steam Power. Philadelphia: John P. Murphy, 1874.

Nystrom, John W. 1824-1885., and James Haworth. On Supplying Philadelphia With Water, From the Schuylkill and Wissahickon Without the Aid of Steam Power. Philadelphia: John P. Murphy, 1874.