Ghumman, Bikram Singh. Guru Nanak : jeevan, chintan aur kala / Dr. Bikram Singh Ghumman. - Amritsar : Varis Shah Foundations, 2003. - 112p. ISBN: 8178560860 : Rs.100/- Subjects--Topical Terms: Sikhism--Nanak Dev (Guru)--Biography--Philosophy.Sikh Gurus--Sikh preaching.