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| 1. |
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Chemistry of the Environment
Ronald A Bailey, Herbert M Clark, James P Ferris, Sonja Krause, Robert L Strong
E-bok. Elsevier Science, Storbritannien, 2002.
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| 2. |
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Kids and School Reform
Patricia A Wasley, Robert L Hampel, Richard W Clark
Inbunden. Jossey-Bass Inc.,U.S., USA, 1997.
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| 3. |
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A History of Public Sector Pensions in the United States
Robert L Clark, Lee A Craig, Jack W Wilson
Inbunden. University of Pennsylvania Press, USA, 2003.
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| 4. |
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ROMARD Volume 56/57. Early English Drama
Robert L A Clark
Häftad. Medieval Institute Publications, 2020.
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| 5. |
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State and Local Retirement Plans in the United States
Robert L Clark, Lee A Craig, John Sabelhaus
Inbunden. Edward Elgar Publishing Ltd, Storbritannien, 2011.
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