TY - GEN AU - W C Martin AU - Romuald Zalubas AU - Lucy Hagan C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.NSRDS.60 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Atomic energy levels - the rare-earth elements ::the spectra of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetitum ER -