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lab recording, 1/4/1991, 23.5°C (Sony WM-D3, QMC Mini bat detector at 25 kHz, tape: BASF-CMII, tape no. Th10/90:000-082) lab recording, 1/4/1991, 23.5°C (Sony WM-D3, QMC Mini bat detector at 25,35,20,40 kHz, tape: BASF-CMII, tape no. Th10/90:130-463, duetting?) |