Breathe: The International Breathwork Magazine, editor Robert Moore, 7 Silver
     Street, Buckfastleigh,  Devon TQ11 OBQ, UK.
     Website:  http://www.users.zetnet.co.uk/rmoore
The Inner Door,  Quarterly Newsletter of the Association for Holotropic
     Breathwork International, PO Box 7167, Santa Cruz, CA  95061-7169.
      Website:  http://www.breathwork.com
The International Journal of Pre and Perinatal Psychology and Medicine: 
     Mattes Verlag,  PO Box 103866, 69028 Heidelberg, Germany.
     Website:  http://isppm.de/index_e.html
The International Breathwork Foundation
     Website:  http://ibfnetwork.org
The Global Professional Breathwork Alliance
     Website:  http://www.breathworkalliance.org
International University of Professional Studies, Distance Learning Graduate
     Programs in Spiritual Psychology
     Website:  http://www.iups.edu
The Journal of Pre- and Peri-natal Psychology and Health:
      Website:   http://www.birthpsychology.com/
Transformations Incorporated, School of Spiritual Psychology
     Website:  http://www.transformationsusa.com
White, M. The Optimal Breathing Times. https://breathing.com