- Author: Klaus Eugen Knorr
- Language: English
- Year: 2015
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- Language: English
- Year: 2015
- Author: Klaus Eugen Knorr, Sidney Verba
- Language: English
- Year: 2019
- Author: Klaus Eugen Knorr (editor), James N. Rosenau (editor)
- Language: English
- Year: 2017
- Author: Klaus Eugen Knorr
- Language: English
- Year: 2015
- Author: Klaus Eugen Knorr (editor)
- Language: English
- Year: 2017
- Author: Klaus Eugen Knorr
- Language: English
- Year: 1959