${\Rm He} (1\,^1{\rm S},\, 2\,^3{\rm S},\, 2\,^1{\rm S},\, 2\,^3{\rm P} \To \, N\, ^{1,3} L)$: Thermally Averaged Electron Collision Strengths for $N \Leq 5$
Astronomy and Astrophysics Supplement Series
doi 10.1051/aas:2000277
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Date
November 1, 2000
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EDP Sciences