共 50 条
- [44] LIQUID-NITROGEN LEVEL CONTROLLER INSTRUMENTS AND EXPERIMENTAL TECHNIQUES-USSR, 1971, 14 (02): : 633 - +
- [49] AN AUTOMATIC LIQUID-NITROGEN DISPENSER REVIEW OF SCIENTIFIC INSTRUMENTS, 1952, 23 (08): : 446 - 446
- [50] CRYOPRESERVATION OF ENCYSTED TOXOPLASMS IN LIQUID-NITROGEN TROPENMEDIZIN UND PARASITOLOGIE, 1975, 26 (03): : 307 - 311