Engineers' Society of Western Pennsylvan

• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 18
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 22
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 26
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 28
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 32
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 33
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 34
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 36
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volume 37
• Proceedings of the Engineers' Society of Western Pennsylvania, Volumes 11-12
• Proceedings Of The Engineers' Society Of Western Pennsylvania, Volumes 7-8
• Proceedings, Volume 28