TY - RPRT TI - High-precision measurement of variations in calcium isotope ratios in urine by multiple collector inductively coupled plasma mass spectrometry AU - J.L.L. Morgan AU - G.W. Gordon AU - R.C. Arrua AU - J.L. Skulan AU - A.D. Anbar AU - T.D. Bullen PY - 2011 DO - 10.1021/ac200361t UR - https://pubs.usgs.gov/publication/70034327 ID - 70034327 ER -