Author: Singh, Baldev
Publisher:Nehru Memorial Museum and Library, New Delhi
Copyright:1986
Author: S. Gopal
Publisher:Jawaharlal Nehru Memorial Fund, New Delhi
Copyright:1986
Author: S. Gopal
Publisher:Orient Longman, New Delhi
Copyright:1975
Author: Kumar, Ravinder Sharma, Hari Dev
Publisher:Vikas Publishing House, New Delhi
Copyright:1986