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- Language: English
- Year: 2008

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- Language: English
- Year: 1955

- Author: Michael E. Lodahl
- Language: English
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- Author: Eberhard Arnold
- Language: English
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- Author: George C. Berthold Jaroslav Pelikan Irenee-Henri Dalmais
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- Year: 1985

- Author: Thomas M. Finn
- Language: English
- Year: 1997

- Author: Joseph Dan Ronald C. Kiener
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- Year: 1986

- Author: Gregory Palamas
- Language: English
- Year: 1982

- Author: Raimon Panikkar
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- Year: 1999

- Author: Raymond Edward Brown
- Language: English
- Year: 1990