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Concentración psicológica / Ernst Ott ; tr. Vicente Gamarra. by
Material type: Text Text; Literary form: Not fiction
Publication details: Bilbao, Esp. : Mensajero, [1990?]
Availability: Items available for loan: Bib. Gregorio Torres Quintero (1)Collection, call number: Colección General BF321 O8.2.

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Enseñe a pensar a su hijo : activación preescolar de la inteligencia / Ernst Ott. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Bilbao (Esp.) : Mensajero, 1990
Availability: Items available for loan: Bib. Gregorio Torres Quintero (5)Collection, call number: Colección General LB1062 O8.4, ...

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Súperese pensando : hacia un pensamiento lógico y eficaz / Ernst Ott ; tr. Isaac Bravo. by
Edition: 5a ed.
Material type: Text Text; Literary form: Not fiction
Publication details: Bilbao, Esp. : Mensajero, [199-?]
Availability: Items available for loan: Bib. Gregorio Torres Quintero (1)Collection, call number: Colección General BF431 O8.78.

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