Ayres, F. (1981). Schaums outline of theory and problems of differential equations in SI metric units. McGraw-Hill.
Chicago-referens (17:e uppl.)Ayres, Frank. Schaums Outline of Theory and Problems of Differential Equations in SI Metric Units. New Delhi: McGraw-Hill, 1981.
MLA-referens (9:e uppl.)Ayres, Frank. Schaums Outline of Theory and Problems of Differential Equations in SI Metric Units. McGraw-Hill, 1981.
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