E. Goursat. Lecons sur l'Integration des Equations aux Derivees Partielles du Premier Ordre... Paris; A. Hermann, 1891. 8vo, 354pp. Wrappered volume rebound in fairly sumptuous red morocco with raised bands, and red marbled boards. As is common with these publications at this time, the paper stock employed by Hermann was of modest quality, and so the paper over time has browned. Still, a very nice copy. $165


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