S. KoetsawangMahidol University2018-06-142018-06-141987-01-01British Journal of Family Planning. Vol.12, No.4 SUPPL. (1987), 6-14014486252-s2.0-0023092439https://repository.li.mahidol.ac.th/handle/20.500.14594/15453Mahidol UniversityMedicineArticleSCOPUS