TY  - RPRT
TI  - The Calculation of rotational energy levels and rotational line intensities in diatomic molecules 
AU  - Hougen, Jon T
PY  - 1970
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS MONO 115
DO  - 10.6028/NBS.MONO.115
ER  -