TY - RPRT TI - USGS48 Puerto Rico precipitation - A new isotopic reference material for δ 2 H and δ 18 O measurements of water AU - Haiping Qi AU - Tyler B. Coplen AU - Lauren V. Tarbox AU - Jennifer M. Lorenz AU - Martha A. Scholl PY - 2014 DO - 10.1080/10256016.2014.905555 UR - https://pubs.usgs.gov/publication/70186518 ID - 70186518 ER -