TY - RPRT TI - Caution on the use of Viton® or FETFE® O-rings in carbon dioxide sample containers for δ 18 0 analysis AU - Kinga M. Revesz AU - Tyler B. Coplen PY - 1991 DO - 10.1016/0168-9622(91)90054-z UR - https://pubs.usgs.gov/publication/70016947 ID - 70016947 ER -