Gracewing · Life Cycle Books · Random House
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Billings Method: Controlling Fertility without Drugs or Devices | 978-0-85244-262-3 (0-85244-262-9) | 1994 | Ann Westmore |
| The Billings Method: Controlling Fertility without Drugs or Devices | 978-0-919225-17-6 (0-919225-17-9) | 2000 | " |
| The Billings Method: Controlling Fertility Without Drugs or Devices | 978-0-394-52120-6 (0-394-52120-X) | 1981 | Ann Westmore (Contributor) |