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DELTELL PASCUAL JESUS
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DELTELL PASCUAL JESUS
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Priority to ES0053913UpriorityCriticalpatent/ES53913U/en
Publication of ES53913UpublicationCriticalpatent/ES53913U/en
Printed arithmetic exercises, which are characterized by being formed by various operations of the four basic rules, from the most elementary to the most superior, and by other similar exercises, within arithmetic. (Machine-translation by Google Translate, not legally binding)
ES0053913U1956-04-261956-04-26Printed arithmetic exercises (Machine-translation by Google Translate, not legally binding)
PendingES53913U
(en)