W. L. Wiese, M. W. Smith, and B. M. Miles
U.S. Dept. of Commerce, National Bureau of Standards : for sale by the Superintendent of Documents, U.S. Govt. Print. Off.
1969
National standard reference data series
NSRDS-NBS 22 . Atomic transition probabilities : a critical data compilation ; v. 2
Available at 18 libraries