The pure principle; an introduction to the philosophy of Shankara / by Y. Keshava Menon and Richard F. Allen. Menon, Y. Keshava. Allen, Richard F., 1908- ed. Śaṅkarācārya. B133.S5 M4 [East Lansing]: Michigan State University Press, 1960, 1960, 1960 Text xii, 127 p. eng