TY - RPRT TI - Precision Density Measurements Near the Helium Lambda Transition Using High-Q Microwave Cavities AU - Strayer, D. M. AU - Jiang, W. AU - Yeh, N. C. AU - Asplund, N. PY - 1996 UR - https://ntrs.nasa.gov/citations/20060036134 ID - 20060036134 ER -