AGNEW, R. P. (1960). Differential Eqations Ralph Palmer Agnew. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)AGNEW, Ralph Palmer. Differential Eqations Ralph Palmer Agnew. McGraw-Hill, 1960.
Lua MLA (8ú heag.)AGNEW, Ralph Palmer. Differential Eqations Ralph Palmer Agnew. McGraw-Hill, 1960.
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