TY - GEN AU - Lucy Hagan C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1977-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.363supp1 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1977 TI - Bibliography on atomic energy levels and spectra, July 1971 through June 1975: ER -