| title | ISBN-13 | year of publication | |
|---|---|---|---|
| A Cooperative Method of Natural Birth Control | 978-0-913990-84-1 | 1992 | |
| A cooperative method of natural birth control | 978-0-913990-13-1 | 1979 | |
| A Cooperative Method of Natural Birth Control | 978-0-913990-06-3 | 1976 | |
| Kursbuch Eltern, Natürliche Geburtenkontrolle | 978-3-453-04975-8 | 2000 | |
| Signs of Fertility: The Personal Science of Natural Birth Control | 978-0-940847-08-8 | 1998 | |
| Signs of Fertility: The Personal Science of Natural Birth Control | 978-0-940847-07-1 | 1987 | |
| The Fertility Question | 978-0-913990-43-8 | 1982 |
Book Pub Co · Heyne · Mnd Pub