Mathematics.
Lal, Harbans.
Mathematics. - 3rd ed. - New Delhi : Sultan Chand & Sons (P) Ltd, 2003. - 25.21 p. ill. 24 cm.
510 LAL
Mathematics. - 3rd ed. - New Delhi : Sultan Chand & Sons (P) Ltd, 2003. - 25.21 p. ill. 24 cm.
510 LAL