Harry Pollard. (1985). Ordinary differential equations: An elementary textbook for students of Mathematics, Engineering, and the Science. Mineola, New York: Dover.
استشهاد بنمط شيكاغوHarry Pollard. Ordinary Differential Equations: An Elementary Textbook for Students of Mathematics, Engineering, and the Science. Mineola, New York: Dover, 1985.
MLA استشهادHarry Pollard. Ordinary Differential Equations: An Elementary Textbook for Students of Mathematics, Engineering, and the Science. Mineola, New York: Dover, 1985.
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