(1787). The constitution of the Pennsylvania Society for Promoting the Abolition of Slavery and the relief of free Negroes, unlawfully held in bondage: Begun in the year 1774 and enlarged on the twenty-third of April 1787 : to which are added the acts of the General Assembly of Pennsylvania, for the gradual abolition of slavery. Philadelphia: Printed by Joseph James ....

The Constitution of the Pennsylvania Society for Promoting the Abolition of Slavery and the Relief of Free Negroes, Unlawfully Held in Bondage: Begun in the Year 1774 and Enlarged On the Twenty-third of April 1787 : To Which Are Added the Acts of the General Assembly of Pennsylvania, for the Gradual Abolition of Slavery. Philadelphia: Printed by Joseph James ..., 1787.

The Constitution of the Pennsylvania Society for Promoting the Abolition of Slavery and the Relief of Free Negroes, Unlawfully Held in Bondage: Begun in the Year 1774 and Enlarged On the Twenty-third of April 1787 : To Which Are Added the Acts of the General Assembly of Pennsylvania, for the Gradual Abolition of Slavery. Philadelphia: Printed by Joseph James ..., 1787.