TY - GEN AU - Mandel, John AU - Young, Donald S AU - Cali, J Paul C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1972-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-36 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1972 TI - Standard Reference Materials:A reference method for the determination of calcium in serum ER -