TY - GEN AU - Aaron S Posner AU - Alfred F Diorio C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1957-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.5791 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1957 TI - Refinement of the hydroxypatite structure::progress report ER -