TY - GEN AU - Ann T Nelms C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1956-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.577 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1956 TI - Circular of the Bureau of Standards no. 577::energy loss and range of electrons and positrons ER -