TY - GEN T1 - Roche tomography of cataclysmic variables -- II. Images of the secondary stars in AM Her, QQ Vul, IP Peg and HU Aqr T2 - arXiv PY - 2003/02/06 AU - Watson CA AU - Dhillon VS AU - Rutten RGM AU - Schwope AD ED - Y2 - 2024/12/23 ER -