books.google.co.inhttp://books.google.co.in/books/about/Bhagat_Singh_and_His_Times.html?id=98gBAAAAMAAJ&utm_source=gb-gplus-shareBhagat Singh and His Times
bok (first pages) Chapter I. SIKH GURUS: Life and Teachings. Duggal, ks. Sikh Gurus; Their Life and Teachings, Vikas Publishing House, New. Delhi, 1980,240. pp. ... www.globalsikhstudies.net/ pdf/ BIBLIOGRAPHY%20(SP%20Gulati).pdf