Wanting to Prevent Pregnancy? Looking for a Fresh Approach to Birth Control? [Vietnamese] - page 4

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“Phương ph p Billings s đi v o l ch s y
khoa như m t trong nh ng ph t ki n vĩ đ i
nh t c a th kỷ 20.”
Thomas W. Hilgers, Gi o s S n Ph khoa, Omaha Hoa K