Mary Billings (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Mary Billings" in English language version.

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3books.google.com

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books.google.com

Museum, Anacostia (2005-01-05). The Black Washingtonians: The Anacostia Museum Illustrated Chronology. Wiley. ISBN 978-0-471-40258-9.
Mould, David; Loewe, Missy (2009-10-15). Remembering Georgetown: A History of the Lost Port City. Arcadia Publishing. ISBN 978-1-61423-530-9.
Carrier, Thomas J. (1999). Historic Georgetown: A Walking Tour. Arcadia Publishing. ISBN 978-0-7385-0239-7.

doi.org

Preston, Emmett D. (1943). "The Development of Negro Education in the District of Columbia, 1800-1860". The Journal of Negro Education. 12 (2): 189–198. doi:10.2307/2292971. ISSN 0022-2984. JSTOR 2292971.

jstor.org

Preston, Emmett D. (1943). "The Development of Negro Education in the District of Columbia, 1800-1860". The Journal of Negro Education. 12 (2): 189–198. doi:10.2307/2292971. ISSN 0022-2984. JSTOR 2292971.

worldcat.org

search.worldcat.org

Preston, Emmett D. (1943). "The Development of Negro Education in the District of Columbia, 1800-1860". The Journal of Negro Education. 12 (2): 189–198. doi:10.2307/2292971. ISSN 0022-2984. JSTOR 2292971.