Zaehner, "Hindu and Muslim Mysticism" (1960,1969) at 6, in connection with S. N. Dasgupta, "A History of Indian Philosophy" (Cambridge 1951), and "Hindu Mysticism" (Chicago 1927).
Zaehner, "Hindu and Muslim Mysticism" (1960,1969) at 6-11. Zaehner references S. N. Dasgupta, his "A History of Indian Philosophy" (Cambridge 1951), and his "Hindu Mysticism" (Chicago 1927).