publisher: HeartMath publish date: 1998
format: hardcover pages: 318
language: English
ISBN:
1879052431 (9781879052437)
publisher: HeartMath
publish date: January 1st 1991
format: paperback pages: 194
language: English
ISBN:
1879052059 (9781879052055)
publisher: Planetary Publishing Company publish date: December 1st 1992
format: paperback pages: 288
language: English
ISBN:
1879052172 (9781879052178)