States entitled an act for the encouragement of learning hy securing the copies of maps, charts and books to the author., and proprietors of such copies during the times therein mentioned, and also to an act entitled an act supplementary to an act, entitled... Colburn's First Lessons: Intellectual Arithmetic, Upon the Inductive Method ... - Σελίδα ii των Warren Colburn - 1827 - 172 σελίδες Πλήρης προβολή -
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