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1por Berkson, WilliamMaterias “...Popper, Karl R. (Karl Raimund), 1902-1994....”
Publicado 1984
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2por Bailey, Richard, 1957-Materias “...Popper, Karl R. (Karl Raimund), 1902-1994 Contributions in education....”
Publicado 2000
Libro