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Pennsylvania This site contains files in PDF format. |
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Pennsylvania This site contains files in PDF format. |
| George S. Webster and Samuel Tobias
Wagner, "History of the Pennsylvania Avenue Subway, Philadelphia,
and Sewer Construction Connected Therewith," Transactions
of the American Society of Civil Engineers, Volume XLIV (December
1900), pp. 1-33 and plates I - IV. |
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N. S. Sprague and Chas. M. Reppert; "The Pittsburgh Sewer Explosion;" Engineering News; Vol. 71, No. 1 (January 1, 1914); pp. 22-28. |
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"Discharge of Inflammable Wastes Into Sewers - Problem of Prevention - The Pittsburgh Sewer Explosion Investigation," Engineering and Contracting, Vol XLII, No. 21 (November 18, 1914), pp. 476-478. PDF (scanned by Google Books) |
| Grant M. Olewiler, "Sewer Maintenance," Sewage Works Journal, Volume IX, No. 5 (September 1937), pp. 808-820. Frames version with JavaScript. PDF version (printer-friendly). |
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