Electronic data. [Ann Arbor, Mich. : University of Michigan Digital Library Services, 2002?] PDF/Page image/Ascii text. Mode of access: Internet.
Contents
pt. I. (Vol. I) Exact equations and Pfaff's problem. 1890.--pt. II. (Vol. II-III) Ordinary equations, not linear. 1900.--pt. III. (Vol. IV) Ordinary equations. 1902.--pt. IV (vol. V-VI) Partial differential equations. 1906.
Misc.
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