TY  - JOUR
UR  - https://doi.org/10.1515/jpme.1977.5.3.103
TI  - Review article
T3  - Journal of Perinatal Medicine
PY  - 1977
DO  - doi:10.1515/jpme.1977.5.3.103
VL  - 5
IS  - 3
SP  - 103
EP  - 113
Y2  - 2026-05-10
ER  -