1.
Ensenanza de algebra elemental/ The Teaching of Elementary Algebra: Una Propuesta Alternativ...
by Sonia Ursini
ISBN: 9789682467523
List Price: $19.95
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Siete Misteriosas Ficciones 1°Ed - Dic-94
by Sonia Ursini, Corregidor, S...
ISBN: 9789500508292
List Price: $12.00