------History of the Negro Race in the United States from 1619-1880. 
Negroes as Slaves, as Soldiers, and as Citizens:  together with a
preliminary Consideration of the Unity of the Human Family, an historical
Sketch of Africa and an Account of the Negro Governments of Sierra Leone
and Liberia. (New York, 1883.)

Woodson, C.G. The Education of the Negro Prior to 1861. (New York and London, 1915.) This is a history of the Education of the Colored People of the United States from the beginning of slavery to the Civil War.

Woolman, John. The Works of John Woolman.  In two Parts, Part I:  A Journal of the Life, Gospel-Labors, and Christian Experiences of that faithful Minister of Christ, John Woolman, late of Mount Holly in the Province of New Jersey. (London, 1775.)

------Same, Part Second.  Containing his last Epistle and other
Writings. (London, 1775.)

------Some Considerations on the Keeping of Negroes.  Recommended to the
Professors of Christianity of every Denomination. (Philadelphia,
1754.)

------Considerations on Keeping Negroes; Recommended to the Professors
of Christianity of every Denomination.  Part the Second. (Philadelphia,
1762.)

Wright, R.R., Jr. The Negro in Pennsylvania. (Philadelphia, 1912.)

MAGAZINES

The African Methodist Episcopal Church Review.  The following articles: 

    The Negro as an Inventor.  By R. R. Wright, vol. ii, p. 397.

    Negro Poets, vol. iv, p. 236.

    The Negro in Journalism, vols. vi, p. 309, and xx, p. 137.

The African Repository; Published by the American Colonization Society from 1826 to 1832.  A very good source for Negro history both in this country and Liberia.  Some of its most valuable articles are: 

    Learn Trades or Starve, by Frederick Douglass, vol. xxix,
    p. 137.  Taken from Frederick Douglass’s Paper.

    Education of the Colored People, by a highly respectable
    gentleman of the South, vol. xxx, pp. 194, 195 and 196.

    Elevation of the Colored Race, a memorial circulated in
    North Carolina, vol. xxxi, pp. 117 and 118.

    A lawyer for Liberia, a sketch of Garrison Draper, vol.
    xxxiv, pp. 26 and 27.

The American Economic Review.

The American Journal of Social Science.

The American Journal of Political Economy.

The American Law Review.

The American Journal of Sociology.

The Atlantic Monthly.

The Colonizationist and Journal of Freedom.  The author has been able to find only the volume which contains the numbers for the year 1834.

The Christian Examiner.

The Cosmopolitan.