Manuals on how to read and recite mantras

sngags klog [TBRC T1088], sngags bzlas brjod. Ex: Sngags kyi klog thabs ‘bras bu ‘byung ba’i me tog (W11407), Sngags bzlas brjod kyi yig chung (W10542), Yig brgya bzla tshul snying gi thur ma (Vajrasattva mantra recitation) (W5139), MaNDal dang yig brgya bzlas pa (W1565).