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Allan D. Clark, A History of the Church in Korea. Christian Literature Society of Korea, 1971. pp.479. |
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Everett Nicholls Hunt, Protestant Pioneers in Korea. Orbis Books, 1980. Pbk. ISBN-13: 978-0883443965. pp.122. |
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L.G. Paik, The History of Protestant Missions in Korea, 1832-1910. Yonsei University Press, 1987. |
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James M. Phillips, "Underwood, Horace Grant," Gerald H. Anderson, ed., Biographical Dictionary of Christian Missions. Grand Rapids, MI: Cambridge, UK: Eerdmans, 1988. Pbk. ISBN: 0802846807. p.689. |
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Bong Rin Ro, "Underwood, Horace G." A. Scott Moreau, ed., Evangelical Dictionary of Christian Missions. Grand Rapids: Baker, 2000. Hbk. ISBN: 0801020743. p.980.
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Christine Isabel Tinling [1869-1943], Heroes of the Cross. Dr Frederick Baedeker :: Horace Underwood :: Arthur Neve of Kashmir. London: Marshall, Morgan & Scott. Ltd., [1933]. Hbk. pp.96. pdf [This material is in the Public Domain] |
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Lillias H. Underwood, Fifteen Years Among the Top-Knots. 1904. |
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Lillias H. Underwood, With Tommy Tompkins in Korea. 1905. |
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Lillias H. Underwood, Underwood of Korea. 1918. |
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