Breathe: The International Breathwork Magazine, editor Robert Moore, 7 Silver Street, Buckfastleigh,  Devon TQ11 OBQ, UK.
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. 
breathwork.com

The International Journal of Pre and Perinatal Psychology and Medicine: Mattes Verlag,  PO Box 103866, 69028 Heidelberg, Germany.
isppm.de/index_e.html

The International Breathwork Foundation
http://breathwork.com

International University of Professional Studies, Distance Learning Graduate Programs in Spiritual Psychology
iups.edu

The Journal of Pre- and Peri-natal Psychology and Health
Birthpsychology.com

Transformations Incorporated, School of Spiritual Psychology
Transformationsusa.com

White, M. The Optimal Breathing Times
breathing.com