More detailed spectrum of sodium?

[mitcho]

I am in need of the wavelength of the spectral lines of sodium but all I can find is the wavelength for the doublet. I am looking for the cyan coloured one that appears very close to 500nm but I cannot find the exact value anywhere. Would anyone be able to direct me somewhere?
Thanks

 

[mathman]

http://www.nist.gov/pml/data/handbook/index.cfm
http://www.nist.gov/pml/data/asd.cfm

Try the above.