PT Unknown AU Mair, U Suttywong, N Hübers, H Semenov, AD Richter, H Wagner, G Birk, M TI Development of 1.8 THz receiver for the TELIS instrument SE Proc. 16[super:th] Int. Symp. Space Terahertz Technol. PY 2005 PI Göteborg, Sweden ER