Beinecke Rare Book Library, Yale University
International Collections, Yale University Library
British Studies, Yale University
International Security Studies, Yale University
Netaji Research Bureau (Kolkata)
Center for Historical Studies, Jawaharlal Nehru University, New Delhi
Nehru Memorial Museum and Library
National Archives of India, New Delhi
The School of Oriental and African Studies, London(South Asian Studies)
The British Library, London
The Public Record Office, London