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lab recording, 12/8/1988, 32°C, 60 W bulb for heat (Sony WM-D3 with Universum mono, tape: UX-ES90, tape no.: YU8/88:453-521) lab recording, 12/8/1988, 32°C, 60 W bulb for heat (Sony WM-D3 and QMC Mini bat detector at 35 kHz, tape: UX-ES90, tape no. YU8/88:601-622) lab recording, 12/8/1988, 32°C, 60 W bulb for heat (Sony WM-D3 and QMC Mini bat detector at 35 KHz, tape: UX-ES90, tape no. YU8/88:623-693) |