TY - GEN AU - Oberholtzer, Betty L C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1967-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.MP.240-2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1967 TI - Publications of the National Bureau of Standards Supplement of MP240/: ER -