TY - GEN AU - Ruthberg, Stanley C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.400-73 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Graphical solution for the helium leak detector and radioisotope methods of hermetic test: ER -