1. A “super-thermal” source for ultra-cold neutrons;Golub,1978
2. Search for single-roton emission from negative ions in HeII;Ellis,1981
3. An apparatus for producing pure 4He;Mezhov-Deglin;Cryogenics,1972
4. Isotopically pure 4He;Fatouros;Cryogenics,1975
5. Isotopic purification of helium by differential distillation below the lambda point;Tully;U.S. Bureau of Mines Report of Investigations No. 8054,1975