Babbar V. K., Puri R. K., . (2011). Solid State Physics. : S CHAND & Co Pvt.Ltd.
Babbar V K, Puri R K, . 2011. Solid State Physics. : S CHAND & Co Pvt.Ltd.
Babbar V K, Puri R K, . Solid State Physics. : S CHAND & Co Pvt.Ltd. 2011.