Dyfyniad APA

Petrovsky, I. G. (1964). Lectures on partial differential equations.

Dyfyniad Arddull Chicago

Petrovsky, I G. Lectures on Partial Differential Equations. Dover Publication, New York, 1964.

Dyfyniad MLA

Petrovsky, I G. Lectures on Partial Differential Equations. 1964.

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