Goursat, Edouard <br/><br/>
Variation of solutions: Partial differential equations of the second order 
Edouard Goursat 
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 - Dover Publcations, New York  1964 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations-- Analysis-- Mathematics
<br/><br/><label>Dewey Class. No.: </label>515.35  GOU-V