Boole, George, 1815-1864. A treatise on differential equations / Boole's differential equations by George Boole. - 4th ed. - London : Macmillan and Co., 1877 . - 496 p. : ill. (part folded) ; 20 cm. ISBN: (Hbk.) Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35