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              Billari, F. C., Philipov, D. & Testa, M. R. (2009). Attitudes, norms and perceived behavioural control: Explaining fertiltiy intentions in Bulgaria. European Journal of Population/Revue européenne de Démographie, 25, 4, S. 439-465.
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              Billari, F. C., Philipov, D., & Testa, M. R. (2009). Attitudes, norms and perceived behavioural control: Explaining fertility intentions in Bulgaria. European Journal of Population, 25(4), 439-465.
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              Billari, F. C., Philipov, D., & Testa, M. R. (2009). Attitudes, norms, and perceived behavioural control: Explaining fertility intentions in Bul- garia. European Journal of Population, 25(4), 439-465.
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              Billari, F. C., Philipov, D., Testa, M. R. (2009). Attitudes, norms, and perceived behavioural control: Explaining fertility intentions in Bul- garia. European Journal of Population/Revue européenne de Démographie, 25(4), pp. 439-465.
                 (xsd:string)
              
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