Adam Eckfeldt (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Adam Eckfeldt" in Portuguese language version.

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Camparette March 1906, p. 78. Camparette, Louis T. (março de 1906). «On the utility of a cabinet of historic coins». Colorado Springs, CO: American Numismatic Association. The Numismatist
Scharf & Westcott, p. 1894. Scharf, John Thomas; Westcott, Thomas (1884). History of Philadelphia. III. Filadélfia: L.H. Everts & Co.
Franklin Institute, p. 282. «On fire engines, hose, and some other apparatus manufactured and used in Philadelphia, for the purpose of extinguishing fire». Filadélfia: The Franklin Institute. The Franklin Journal and American Mechanics' Magazine. Maio de 1827

Ferguson, p. 70. Ferguson, ed. (1965). Early Engineering Reminiscences (1815–40) of George Escol Sellars. Washington, DC: Smithsonian Institution. OCLC 522166
Ferguson, p. 71. Ferguson, ed. (1965). Early Engineering Reminiscences (1815–40) of George Escol Sellars. Washington, DC: Smithsonian Institution. OCLC 522166
Ferguson, p. 76. Ferguson, ed. (1965). Early Engineering Reminiscences (1815–40) of George Escol Sellars. Washington, DC: Smithsonian Institution. OCLC 522166
Ferguson, pp. 76–78. Ferguson, ed. (1965). Early Engineering Reminiscences (1815–40) of George Escol Sellars. Washington, DC: Smithsonian Institution. OCLC 522166