Carmichael, Robert. **E 5013.59 A treatise on the calculus of operations: designed to facilitate the processes of the differential and integral calculus and the calculus of finite differences. Lond. Longman. 1855. xii, 170, (1) pp. 8°
-Calculus of opera GD 205-0: 220r0n0101 equa- tions.-Finite differences. (Calculus of.)