TY - GEN AU - Flynn,A M AU - Kelly,J TI - Natural methods of family planning SN - 0140-6736 PY - 1978///0218 KW - Body Temperature KW - Cervix Mucus KW - analysis KW - Family Planning Services KW - Female KW - Health Education KW - Humans KW - Methods N1 - Publication Type: Letter UR - https://doi.org/10.1016/s0140-6736(76)92432-6 ER -