Bernard Gittelson

• How to make your own luck
• Biorhythm
• Intangible evidence
• Bio-rhythm : a personal science
• Biorhythm Personal Science
• Biorhythm 1991 - 92 - 93
• Biorhythm 1994 - 95 - 96
• Biorhythm 1995 - 96 - 97
• Biorhythm sports forecasting
• Biorhythms
• The Gittelson biorhythm code book
• Vos biorythmes