Andrews, F. M., & Aichholzer, G. (1979). Scientific productivity, the effectiveness of research groups in six countries. Cambridge: Cambridge University Press.
Παραπομπή Chicago StyleAndrews, Frank M., and Georg Aichholzer. Scientific Productivity, the Effectiveness of Research Groups in Six Countries. Cambridge: Cambridge University Press, 1979.
Παραπομπή MLAAndrews, Frank M., and Georg Aichholzer. Scientific Productivity, the Effectiveness of Research Groups in Six Countries. Cambridge: Cambridge University Press, 1979.
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