TY - JOUR AU - Dempsey, Christopher AU - Bopp, B AU - Henry, G AU - Hall, D C2 - Astrophysical Journal Supplement Series DA - 1993-01-01 LA - en M1 - 86 PB - Astrophysical Journal Supplement Series PY - 1993 TI - Observations of the Ca II infrared triplet in chromospherically active single and binary stars ER -