- Author: Kroger F.A.
- Language: English
- Year: 1964
- Author: Teufel Trey, Kroger William S
- Language: English
- Year: 2011
- Author: Anna Metteri, Teppo Kroger, Anneli Pohjola, Pirkko-Liisa Rauhala
- Language: English
- Year: 2005
- Author: Linda A. Wood Rolf O. Kroger
- Language: English
- Year: 2000
- Author: Aurelio De Rosa, Craig Buckler, Nilson Jacques, Byron Houwens, Jeff Mott, Graham Cox, Ludovico Fischer, James Wright, James Kolce, Moritz Kroger, Ivan Curic, Samier Saeed, M. David Green, Michaela Lehr, Michael Wanyoike, Darren Jones, Mark Brown
- Language: English
- Year: 2018
- Author: Linda A. Wood, Rolf O. Kroger
- Language: English
- Year: 2000
Iron Will
epub
- Author: Markus Kroger
- Language: English
- Year: 2020
- Author: Teufel Trey, Kroger William S
- Language: English
- Year: 2011
- Author: Carr Barnes, Kroger Helen, Kroger Peter
- Language: English
- Year: 2016