> Multivolume work
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1:
Applied psychology 1 The First Congress Geneva, 1920 ed. by Horst Gundlach
London: Routledge, 1998
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2:
Applied psychology 2 The Second Congress Barcelona, 1921 ed. by Horst Gundlach
London: Routledge, 1998
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4:
Applied psychology 4 The Fourth Congress Paris, 1927 ed. by Horst Gundlach
London: Routledge, 1998
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5:
Applied psychology 5 The Fifth Congress Utrecht, 1928 ed. by Horst Gundlach
London: Routledge, 1998
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8:
Applied psychology 8 The Eighth Congress Prague, 1934 ed. by Horst Gundlach
London: Routledge, 1998
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7:
Applied psychology 7 The Seventh Congress Moscow, 1931 ed. by Horst Gundlach
London: Routledge, 1998
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3:
Applied psychology 3 The Third Congress Milan, 1922 ed. by Horst Gundlach
London: Routledge, 1998
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6:
Applied psychology 6 The Sixth Congress Barcelona, 1930 ed. by Horst Gundlach
London: Routledge, 1998
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9:
Applied psychology 9 The Ninth Congress Bern, 1949 ed. by Horst Gundlach
London: Routledge, 1998
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13:
Applied psychology 13 The Thirteenth Congress Rome, 1958 ed. by Horst Gundlach
London: Routledge, 1998
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10:
Applied psychology 10 The Tenth Congress Gothenburg, 1951 ed. by Horst Gundlach
London: Routledge, 1998
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11:
Applied psychology 11 The Eleventh Congress Paris, 1953 ed. by Horst Gundlach
London: Routledge, 1998
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12:
Applied psychology 12 The Twelfth Congress London, 1955 ed. by Horst Gundlach
London: Routledge, 1998