Onderdonk, B. T. 1. (1840). Christian unity: A sermon, preached at the matriculation of students of the General Theological Seminary of the Protestant Episcopal Church in the United States, on the evening of Advent, Sunday, Nov. 29th, 1840, in St. Peter's Church, New-York. New York: Printed at 96 Nassau Street.

Onderdonk, Benjamin T. 1791-1861. Christian Unity: A Sermon, Preached At the Matriculation of Students of the General Theological Seminary of the Protestant Episcopal Church in the United States, On the Evening of Advent, Sunday, Nov. 29th, 1840, in St. Peter's Church, New-York. New York: Printed at 96 Nassau Street, 1840.

Onderdonk, Benjamin T. 1791-1861. Christian Unity: A Sermon, Preached At the Matriculation of Students of the General Theological Seminary of the Protestant Episcopal Church in the United States, On the Evening of Advent, Sunday, Nov. 29th, 1840, in St. Peter's Church, New-York. New York: Printed at 96 Nassau Street, 1840.