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外文OA文献
>The Tutorial Arithmetic. By W. P. WorkmanM.A., B.Sc. 3/6. (The University Tutorial Series.) - Arithmetic. By R. HargreavesM.A. 4/6. (Clarendon Press.) - Arithmetic. By A. Veitch LothianM.A., B.Sc. (Blackwood and Sons.) - A South African Arithmetic. 3/6. By Henry HillB.A. (Methuen and Co.)
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The Tutorial Arithmetic. By W. P. WorkmanM.A., B.Sc. 3/6. (The University Tutorial Series.) - Arithmetic. By R. HargreavesM.A. 4/6. (Clarendon Press.) - Arithmetic. By A. Veitch LothianM.A., B.Sc. (Blackwood and Sons.) - A South African Arithmetic. 3/6. By Henry HillB.A. (Methuen and Co.)