TY  - JOUR
UR  - https://doi.org/10.1515/jpme.1975.3.1.68
TI  - Short communication
T3  - Journal of Perinatal Medicine
PY  - 1975
DO  - doi:10.1515/jpme.1975.3.1.68
VL  - 3
IS  - 1
SP  - 68
EP  - 72
Y2  - 2026-05-04
ER  -