Hengst P. ea, 1992
Hengst P., Uhlig В., Bollmann R. 1992. Uses of vaginal pH measurement for prevention ofipremature labor // Z.Geburtshelf.Perinatal.Bd 196. S.238-241.
Hengst P., Uhlig В., Bollmann R. 1992. Uses of vaginal pH measurement for prevention ofipremature labor // Z.Geburtshelf.Perinatal.Bd 196. S.238-241.
