Boroughs of Monongahela and South Pittsburgh. Fourth Ward, Pittsburgh. (1872)Atlas of the cities of Pittsburgh, Allegheny, and the adjoining boroughs. From actual surveys & official records, compiled & published by G.M. Hopkins & Co. 320 Walnut St., Philadelphia. 1872. Assistant surveyors: H.W. Hopkins, W.S. MacCormac, Edward Vansciver, Weston R. Smith, Samuel Huff, Robert Foust, L. Cunningham. Assistant publishers: Richard Clark, M.S. Converse, S.T.C. Bell, L.J. Richards, J.C. Martin, W.G. Carter, Isaac Borneman, James Wilson, A.R. Whipple. Engraved by Edward Busch, 320 Walnut St. Entered ... 1872 by G.M. Hopkins ... Washington D.C. F. Bourquin Lith. 320 Chestnut St. PhilaWard 4; Monongahela, S. Pittsburgh boroughs

Chicago citation style
G.M. Hopkins & Co. Boroughs of Monongahela and South Pittsburgh. Fourth Ward, Pittsburgh. (1872),Atlas of the cities of Pittsburgh, Allegheny, and the adjoining boroughs. From actual surveys & official records, compiled & published by G.M. Hopkins & Co. 320 Walnut St., Philadelphia. 1872. Assistant surveyors: H.W. Hopkins, W.S. MacCormac, Edward Vansciver, Weston R. Smith, Samuel Huff, Robert Foust, L. Cunningham. Assistant publishers: Richard Clark, M.S. Converse, S.T.C. Bell, L.J. Richards, J.C. Martin, W.G. Carter, Isaac Borneman, James Wilson, A.R. Whipple. Engraved by Edward Busch, 320 Walnut St. Entered ... 1872 by G.M. Hopkins ... Washington D.C. F. Bourquin Lith. 320 Chestnut St. Phila,Ward 4; Monongahela, S. Pittsburgh boroughs. 1872. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28595~1120483. (Accessed December 16, 2018.)
APA citation style
G.M. Hopkins & Co, (1872) Boroughs of Monongahela and South Pittsburgh. Fourth Ward, Pittsburgh. (1872),Atlas of the cities of Pittsburgh, Allegheny, and the adjoining boroughs. From actual surveys & official records, compiled & published by G.M. Hopkins & Co. 320 Walnut St., Philadelphia. 1872. Assistant surveyors: H.W. Hopkins, W.S. MacCormac, Edward Vansciver, Weston R. Smith, Samuel Huff, Robert Foust, L. Cunningham. Assistant publishers: Richard Clark, M.S. Converse, S.T.C. Bell, L.J. Richards, J.C. Martin, W.G. Carter, Isaac Borneman, James Wilson, A.R. Whipple. Engraved by Edward Busch, 320 Walnut St. Entered ... 1872 by G.M. Hopkins ... Washington D.C. F. Bourquin Lith. 320 Chestnut St. Phila,Ward 4; Monongahela, S. Pittsburgh boroughs. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28595~1120483
MLA citation style
G.M. Hopkins & Co. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28595~1120483>.
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