Pahl .G, Beitz W, . (2007). Engineering Design a Systematic Approach. New Delhi: Springer (India) Pvt. Ltd.
Pahl .G, Beitz W, . 2007. Engineering Design a Systematic Approach. New Delhi: Springer (India) Pvt. Ltd.
Pahl .G, Beitz W, . Engineering Design a Systematic Approach. New Delhi: Springer (India) Pvt. Ltd. 2007.