Asana Pranayama Mudra Bandha by Swami Satyananda
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Available free for Android devices.
Hatha Yoga Pradipika by Svatmarama
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Tratak stands and malas.
Neti pots.
Pranayama in Yoga Nidra, with Matsyendra (24.37).
The sounds of the chakra petals (5.34).
Chakra Beej mantras
Space
Air
Fire
Water
Earth