W.H. McLeod, Gurū Nānak and the Sikh Religion (1968), attempts to apply strict historical research procedures to the traditions concerning Nānak. Harbans Singh, Guru Nanak and the Origins of the Sikh Faith (1969), is more generous in its treatment of the traditional narratives, but not uncritical. J.S. Grewal, Guru Nanak in History (1969), analyzes the impact of Nānak upon the subsequent history of the Sikh community. Gurbachan Singh Talib, Guru Nanak: His Personality and Vision (1969), studies his teachings. Ganda Singh (ed.), Sources of the Life and Teachings of Guru Nanak (1969), a useful anthology of works dealing with Nānak from the earliest traditions to the present day, includes an English translation of a janam-sākhī (the Mahimā Prakās) and a comprehensive bibliography. Khushwant Singh, Hymns of Guru Nanak (1969), offers a selection of Nānak’s hymns in English translation.