TY - JOUR KW - Chromospheres:RS CVn Stars KW - Stellar Chromospheres:Activity AU - Jeffrey Linsky BT - Highlights of Astronomy DA - 1980-01 PY - 1980 SP - 861 EP - 862 T2 - Highlights of Astronomy TI - On the differences at chromospheric levels between RS CVn-type binaries, active and quiet chromosphere single stars, and active and quiet regions in the sun VL - 5 ER -