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              McDonald RP. Test theory: A unified treatment. Hilsdale: Lawrence Erlbaum Associates; 1999. https.// doi.org/10.1111/j.2044-8317.1981.tb00621.x
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              McDonald RP. Test theory: A unified treatment. Hilsdale: Lawrence Erlbaum Associates; 1999. https:// doi.org/10.1111/j.2044-8317.1981.tb00621.x
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              McDonald RP. Test theory: A unified treatment. Lawrence Erlbaum Associates Publishers; 1999.
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              McDonald, R. (1999). Test Theory: A Unified Treatment. Hillsdale, NJ: Lawrence Erlbaum Associates.
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              McDonald, R. (1999). Test Theory: A Unified Treatment. New York, NJ: Lawrence Erlbaum.
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              McDonald, R. P. (1999). Test theory. A unified treatment. Erlbaum. MET Project. (2012). Gathering feedback for teaching. Combining high-quality ob- servations with student surveys and achievement gains. Bill & Melinda Gates Foundation.
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              McDonald, R. P. (1999). Test theory. A unified treatment. Lawrence Erlbaum.
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              McDonald, R. P. (1999). Test theory. A unified treatment. Mahwah, NJ: Erlbaum.
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              McDonald, R. P. (1999). Test theory. A unified treatment. Mahwah, NJ: L. Erlbaum Associates.
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              McDonald, R. P. (1999). Test theory. A unified treatment. Mahwah: Lawrence Erlbaum.
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              McDonald, R. P. (1999). Test theory: A unified treatment . Erlbaum .
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              McDonald, R. P. (1999). Test theory: A unified treatment. Erlbaum.
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              McDonald, R. P. (1999). Test theory: A unified treatment. Hillsdale, NJ: Erlbaum.
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              McDonald, R. P. (1999). Test theory: A unified treatment. Lawrence Erlbaum Associates. https://doi.org/10.1111/j.2044-8317.1981.tb00621.x
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              McDonald, R. P. (1999). Test theory: A unified treatment. Lawrence Erlbaum Associates. https://doi.org/10.1111/j.2044-8317.1981.tb00621.x.
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              McDonald, R. P. (1999). Test theory: A unified treatment. Lawrence Erlbaum.
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              McDonald, R. P. (1999). Test theory: A unified treatment. Mahwah, NJ: Erlbaum.
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              McDonald, R. P. (1999). Test theory: A unified treatment. Mahwah, NJ: Lawrence Erlbaum Associates. doi:10.1111/j.2044-8317.1981.tb00621.x
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              McDonald, R. P. (1999). Test theory: A unified treatment. Mahwah, NJ: Lawrence Erlbaum Associates. https://doi.org/10.1111/j.2044-8317.1981.tb00621.x
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              McDonald, R. P. (1999). Test theory: A unified treatment. Mahwah: Erlbaum.
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              McDonald, R. P. (1999). Test theory: a unified treatment. Mahwah, NJ: Lawrence Erlbaum.
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              McDonald, R. P. (1999). Test theory: a unified treatment. Mahwah: Lawrence Earlbaum Associates.
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              McDonald, R. P. 1999. Test theory: A unified treatment. Mahwah, NJ: Lawrence Erlbaum Associates.
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              McDonald, R. P., 1999: Test theory: A unified treatment. Mahwah, NJ: Erlbaum.
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              McDonald, Roderick P. (1999). Test theory: A unified treatment. New Jersey: Erlbaum.
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              McDonald, Roderick P. (1999). Test theory: Aunified treatment. Hillsdale NJ: Erlbaum.
                 (xsd:string)
              
            
              McDonald, Roderick P. 1999. Test Theory. A Unified Treatment. Mahwah, NJ: Erlbaum.
                 (xsd:string)
              
            
              McDonald, Roderick P. 1999. Test theory: A Unified Treatment. Mahwah: Lawrence Erlbaum Associates.
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