1. PARALLEL RADON AND THORON SURVEY AT SPECIAL UNDERGROUND CIRCUMSTANCES. Authors: GÁBOR SZEILER, TAMÁS VIGH, JÁNOS SOMLAI, CSABA NÉMETH, NORBERT KÁVÁSI, TIBOR KOVÁCS.2. INVESTIGATION OF RADON AND THORON IN DWELLINGS NEARBY A CLOSED HUNGARIAN URANIUM MINE. Authors: TIBOR KOVÁCS, VIKTOR JOBBÁGY, JÁNOS SOMLAI, NORBERT KÁVÁSI, CSABA NÉMETH.