TY - GEN AU - Weinstein, Allan AU - Gibbons, Donald AU - Brown, Stanley AU - Ruff, William C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1981-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.601 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1981 TI - Implant retrieval: ER -