Natural family planning
Brown, J.B., Blackwell, L.F., Billings, J.J., Conway, B., Cox, R.I., Garrett, G., Holmes, J., Smith, M.A.Volume:
157
Language:
english
Journal:
American Journal of Obstetrics and Gynecology
DOI:
10.1016/S0002-9378(87)80137-0
Date:
October, 1987
File:
PDF, 741 KB
english, 1987