Ferrar, W. L. 1893- Differential calculus/ W. L. Ferrar. - Oxford: Clarendon Press, 1956. - 296 p.: 23 cm. LCCN: 56013583 /L Nat. Bib. No.: GB56-690 Subjects--Topical Terms: Differential calculus. Dewey Class. No.: 515.3 / F374d