Piaget, Jean, 1896-1980, Inhelder, Bärbel, 1913-, Langdon, F. J., Lunzer, J. L.
Routledge & K. Paul
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Piaget, Jean, 1896-1980, Gabain, Marjorie
Routledge & Kegan Paul
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Inhelder, Bärbel, 1913-, Piaget, Jean, 1896-1980
Routledge & Kegan Paul
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Piaget, Jean, 1896-1980, Inhelder, Bärbel, 1913-, Bovet, Magali, Chilton, Paul A. (Paul Anthony)
Routledge & K. Paul
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Piaget, Jean, 1896-1980, Inhelder, Bärbel, 1913-, Szeminska, Alina
Routledge & K.Paul
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Piaget, Jean, 1896-1980, Gabain, Marjorie, Cartalis, E. (Emmy)
Routledge & Kegan Paul
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Sigel, Irving E., 1921-, Hooper, Frank H., Piaget, Jean, 1896-1980, Inhelder, Bärbel
Holt, Rinehart and Winston
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Piaget, Jean, 1896-1980, Tomlinson, Joan, 1894-, Tomlinson, Andrew
Routledge & Kegan Paul
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Piaget, Jean, 1896-1980
Routledge & K. Paul
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Piaget, Jean, 1896-1980, Gattegno, Caleb, Hodgson, F. M.
Routledge & Paul
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Piaget, Jean, 1896-1980, Inhelder, Bärbel, 1913-
Presses universitaires de France
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Piaget, Jean, 1896-1980, Rosin, Arnold
Penguin Books
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