Title: Pʻiim kyŏnghŏm i ŏmnŭn puin ŭi imsin hwangnyul chʻulsaeng kanʼgyŏk mit imsin sonmo e kwanhan punsŏk
First published: 1972
Subjects: Pregnancy, Case studies, Birth intervals
LC classification: HB1062.5.I24 K6 1972