Natural birth control for avoiding or achieving pregnancy the dry or wet method
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Makati, Metro Manila
Alba Natural Family Planning Organization
1991, c1990.
|
| Rhifyn: | 2nd ed. |
| Pynciau: |