PIAGGIO, H. (1965). Elementary treatise on differential equations: And their applications. Green book.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)PIAGGIO, H.T.H. Elementary Treatise on Differential Equations: And Their Applications. Dacca: Green book, 1965.
MLA -ийн эшлэл (9 дэх хэвлэлт)PIAGGIO, H.T.H. Elementary Treatise on Differential Equations: And Their Applications. Green book, 1965.
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