TY - RPRT TI - Surface changes in intrauterine contraceptive devices after variable use. AU - L Keith AU - R Bailey AU - G S Berger AU - M Method PY - 1985 DO - 10.1016/s0002-9378(85)80180-0 UR - https://pubmed.ncbi.nlm.nih.gov/3993713/ ID - 3993713 ER -