Report to the Hon. Samuel H. Ashbridge, Mayor of the City of Philadelphia, on the Extension and Improvement of the Water Supply of the City of Philadelphia

Philadelphia. Commission on Extension and Improvement of the Water SupplyRudolph HeringJoseph Miller WilsonSamuel Merrill Gray

出版	1899
URL	http://books.google.com.hk/books?id=CppBAAAAIAAJ&hl=&source=gbs_api