Rastriye Pathyacharcha ki Ruprekha 2005 : Shaikshik Takniki 2.6
Uppal, Shweta ed.
Rastriye Pathyacharcha ki Ruprekha 2005 : Shaikshik Takniki 2.6 - New Delhi N. C. E. R. T. 2009 - p.35
Rastriye Pathyacharcha ki Ruprekha 2005 : Shaikshik Takniki 2.6 - New Delhi N. C. E. R. T. 2009 - p.35