The treasury of knowledge. Book eight, part three, The elements of Tantric practice : a general exposition of the process of meditation in the indestructible way of secret mantra / Jamgön Kongtrul Lodrö Tayé ; Kalu Rinpoché Translation Group under the direction of Khenpo Lodrö Dönyö Rinpoché ; this volume translated and introduced by Elio Guarisco and Ingrid McLeod ; annotated by Elio Guarisco ; and edited by Ingrid McLeod.