NASA NTRS · 19680049186
The theory of Cepheid variability.
Abstract
Nonlinear methods application to Cepheid pulsation variables theory for determinations of mass, luminosity, radius and helium content
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Christy, R. F.. 1968-03-01. The theory of Cepheid variability.. https://ntrs.nasa.gov/citations/19680049186
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