Ayres, F. (1981). Theory and problems of differential equations in SI metric units. Mcgraw Hill.
Παραπομπή Chicago StyleAyres, F. Theory and Problems of Differential Equations in SI Metric Units. Singapore: Mcgraw Hill, 1981.
Παραπομπή MLAAyres, F. Theory and Problems of Differential Equations in SI Metric Units. Mcgraw Hill, 1981.
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