PT Journal AU Zahn, G Hofmann, A Bayer, H Berndt, H Doll, R Herz, W Suesser, M Turnwaldt, E Vogeley, B Wiedemann, W TI Test of three different pumps for circulating He I and He II SO Proc.of the Internat.Cryogenic Engineering Conf., Kiev, GUS, June 8-12, 1992 Cryogenics, ICEC Suppl. PY 1992 BP 100 EP 103 VL 32 LA english ER