Author: Rele, V. G.
Publisher:D B Taraporevala sons and co., Bombay
Copyright:1944
Author: Sivananda, Swami
Publisher:D B Taraporevala sons and co., Bombay
Copyright:1944
Author: चतुर्वेदी, परशूराम Chaturvedi, Parshuram
Publisher:Bharti Bhandar, Prayag
Copyright:1951