TY - BOOK TI - Preterm labor AU - Elder, M. G. (Murdock George). AU - Hendricks, Charles H. SN - 0407023003 PB - Butterworths PP - London : Butterworths , 1981. PY - 1981 UR - https://library.korea.ac.kr/detail/?cid=CAT000045135686&ctype=m