Ngai, Mae (June 1999). "The Architecture of Race in American Immigration Law: A Reexamination of the Immigration Act of 1924". The Journal of American History. 86 (1): 75. doi:10.2307/2567407. JSTOR2567407. S2CID162371987.
Fitzpatrick 1957, p. 309 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Fitzpatrick 1957, p. 310 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Kinnahan 2008 Kinnahan, Thomas P. (2008). "Charting Progress: Francis Amasa Walker's Statistical Atlas of the United States and Narratives of Western Expansion". American Quarterly. 60 (2): 399–423. doi:10.1353/aq.0.0012. S2CID145351855.
Fitzpatrick 1957, pp. 309–310 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Fitzpatrick 1957, p. 311 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Hadley 1897, p. 295 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Hadley 1897, pp. 296–300 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Hadley 1897, pp. 307–308 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Solow 1987 Solow, Robert M. (1987). "What do we know that Francis Amasa Walker didn't?". History of Political Economy. 19 (2): 183–189. doi:10.1215/00182702-19-2-183.
Solow 1987, p. 184 Solow, Robert M. (1987). "What do we know that Francis Amasa Walker didn't?". History of Political Economy. 19 (2): 183–189. doi:10.1215/00182702-19-2-183.
Dunbar 1897, p. 353 Dunbar, Charles F. (July 1897). "The Career of Francis Amasa Walker". Quarterly Journal of Economics. 11 (4): 436–448. doi:10.2307/1880719. JSTOR1880719.
Ngai, Mae (June 1999). "The Architecture of Race in American Immigration Law: A Reexamination of the Immigration Act of 1924". The Journal of American History. 86 (1): 75. doi:10.2307/2567407. JSTOR2567407. S2CID162371987.
Fitzpatrick 1957, p. 309 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Fitzpatrick 1957, p. 310 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Fitzpatrick 1957, pp. 309–310 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Fitzpatrick 1957, p. 311 Fitzpatrick, Paul J. (1957). "Leading American Statisticians in the Nineteenth Century". Journal of the American Statistical Association. 52 (279): 301–321. doi:10.2307/2280901. JSTOR2280901.
Hadley 1897, p. 295 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Hadley 1897, pp. 296–300 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Hadley 1897, pp. 307–308 Hadley, Arthur Twining (1897). "Francis A. Walker's Contributions to Economic Theory". Political Science Quarterly. 12 (2). The Academy of Political Science: 295–308. doi:10.2307/2140123. JSTOR2140123.
Dunbar 1897, p. 353 Dunbar, Charles F. (July 1897). "The Career of Francis Amasa Walker". Quarterly Journal of Economics. 11 (4): 436–448. doi:10.2307/1880719. JSTOR1880719.
Ngai, Mae (June 1999). "The Architecture of Race in American Immigration Law: A Reexamination of the Immigration Act of 1924". The Journal of American History. 86 (1): 75. doi:10.2307/2567407. JSTOR2567407. S2CID162371987.
Kinnahan 2008 Kinnahan, Thomas P. (2008). "Charting Progress: Francis Amasa Walker's Statistical Atlas of the United States and Narratives of Western Expansion". American Quarterly. 60 (2): 399–423. doi:10.1353/aq.0.0012. S2CID145351855.